JP7724870B2 - Sound control device - Google Patents

Description

The present disclosure relates to an acoustic control device.

2. Description of the Related Art Conventionally, there are known sound control devices that are capable of adjusting the playback speed of music (see, for example, Non-Patent Documents 1 and 2).
In the audio control device described in Non-Patent Document 1, when the playback speed of a song is adjusted, the adjusted BPM (Beats Per Minute) of the song is displayed.
The audio control device described in Non-Patent Document 2 displays the BPM specific to the song and the ratio of the adjusted BPM to the BPM specific to the song.

Native Instruments GmbH, "TRAKTOR KONTROL S5 Manual Japanese", Internet, [Search date: June 27, 2021], URL: https://www.native-instruments.com/fileadmin/ni_media/downloads/manuals/traktor/traktor_kontrol_s8_manual_japanese.pdf AlphaTheta Co., Ltd., "rekordbox6.5.1_manual_JA.pdf", [Search date: June 27, 2021], URL: https://cdn.rekordbox.com/files/20210301182151/rekordbox6.5.1_manual_JA.pdf

However, the audio control devices described in Non-Patent Documents 1 and 2 have the problem that it is difficult to intuitively grasp the magnitude relationship of the adjusted BPM relative to the BPM of the original song. For this reason, for example, when trying to return the playback speed to the original speed after adjusting it, the user has a hard time understanding in which direction to operate the control that adjusts the playback speed of the song.

An audio control device according to one aspect of the present disclosure is an audio control device capable of adjusting the playback speed of a song, and is equipped with a display control unit that displays a graphic corresponding to the comparison result between an original BPM, which is a BPM specific to the song, and an adjusted BPM, which is the BPM of the song after the playback speed has been adjusted.

1 is a schematic diagram showing the configuration of an acoustic control device according to a first embodiment. FIG. 2 is a block diagram showing the configuration of a control unit according to the first embodiment. FIG. 4 is a diagram showing an example of display content in a direct display mode according to the first embodiment. FIG. 6 is a diagram showing an example of display content in a ratio display mode according to the first embodiment. FIG. 4 is a diagram showing an example of display content in a figure display mode according to the first embodiment. 10A and 10B are diagrams illustrating the relationship between the ratio of the adjusted BPM to the original BPM and the displayed graphic according to the first embodiment. FIG. 4 is a view showing an example of display content in a slider display mode according to the first embodiment. 10A and 10B are diagrams illustrating the relationship between the ratio of the adjusted BPM to the original BPM and the displayed graphic according to the modification of the first embodiment. 10A and 10B are diagrams illustrating the relationship between the ratio of the adjusted BPM to the original BPM and the displayed graphic according to the modification of the first embodiment. FIG. 10 is a schematic diagram showing a dial provided in an acoustic control device according to a second embodiment. FIG. 11 is a diagram showing an example of a display mode of a ratio display section according to the second embodiment. FIG. 11 is a diagram showing an example of a display mode of a ratio display section according to the second embodiment. FIG. 10 is a diagram showing the arrangement of a ratio display unit according to a modification of the second embodiment. 5A and 5B are schematic diagrams showing modifications of the acoustic control device according to the first and second embodiments.

[First embodiment]
A first embodiment of the present invention will be described below with reference to the drawings.
[General configuration of the acoustic control device]
FIG. 1 is a schematic diagram showing the configuration of an acoustic control apparatus 1 according to this embodiment.
The acoustic control device 1 according to this embodiment is configured to be able to adjust the playback speed of input music. Specifically, the acoustic control device 1 adjusts the playback speed of music by adjusting the BPM (Beats Per Minute) of the music. Note that the BPM of a music represents the tempo at the time of music playback, i.e., the number of beats per minute at the time of music playback. In this embodiment, the acoustic control device 1 is a mixer that individually controls the playback of a first music piece loaded on a first channel and the playback of a second music piece loaded on a second channel, mixes the first music piece played on the first channel and the second music piece played on the second channel, and outputs an audio signal corresponding to the mixed music.
As shown in Fig. 1, the acoustic control device 1 includes a housing 2, two channel operation units 3 (3A, 3B), and a crossfader 4. Although not shown in Fig. 1, the acoustic control device 1 also includes a control unit 5 (see Fig. 2) that controls the operation of the acoustic control device 1.

[Housing configuration]
The housing 2 is formed in a substantially rectangular parallelepiped shape and houses the control unit 5. The housing 2 has a top surface 21, an upper surface 22, a lower surface 23, a left side surface 24, a right side surface 25, and a bottom surface (not shown).
On the top surface 21, two channel operation units 3 (3A, 3B) and a crossfader 4 are arranged.

[Channel operation section configuration]
The two channel operation units 3 (3A, 3B) operate the playback status of the music loaded on the corresponding channels. The two channel operation units 3 are a first channel operation unit 3A that operates the playback status of a first music piece loaded on a first channel, and a second channel operation unit 3B that operates the playback status of a second music piece loaded on a second channel.
Each channel operation section 3 has a jog dial 31, an equalizer adjustment section 32, a channel fader 33, and a playback speed operation section .

The jog dial 31 is rotatably mounted on the top surface 21 and is used to adjust the playback direction and speed of the music being played. The user can perform scratch operations, which are unique to DJ performances, by combining changes in the rotation direction and speed of the jog dial 31.

The equalizer adjustment unit 32 performs equalizer adjustment processing for the corresponding channel and includes a level adjustment unit 321, a high frequency band adjustment unit 322, a mid frequency band adjustment unit 323, a low frequency band adjustment unit 324, and an effect adjustment unit 325.
The level adjustment unit 321 adjusts the input level of the input music piece.
The high frequency band adjusting unit 322 adjusts the volume of the high frequency band of the input music piece. The high frequency band is, for example, a frequency band of 4649 Hz or higher.
The mid-frequency band adjustment unit 323 adjusts the volume of the mid-frequency band of the input music. The mid-frequency band is, for example, a frequency band exceeding 284 Hz and below 4649 Hz.
The low frequency band adjustment unit 324 adjusts the volume of the low frequency band of the input music. The low frequency band is, for example, a frequency band below 284 Hz.
The effect adjustment section 325 adjusts the effect amount of the effect set in the corresponding channel operation section 3 .
The channel fader 33 adjusts the volume output from the corresponding channel operation unit 3 .

The playback speed control unit 34 adjusts the playback speed of the music loaded on the corresponding channel. The playback speed control unit 34 includes a dial 341, a display unit 342, and a switching operation unit 343.
The dial 341 accepts an operation to adjust the playback speed of music. The dial 341 is provided so as to be rotatable clockwise and counterclockwise when viewed from a position facing the top surface 21. As will be described in detail later, the control unit 5 adjusts the BPM of the music loaded on the corresponding channel in accordance with the rotation state of the dial 341, thereby changing the playback speed of the music.
The display unit 342 displays information relating to the playback speed of the music under the control of the control unit 5. The contents displayed by the display unit 342 will be described in detail later.
The switching operation unit 343 switches the display content of the display unit 342. In other words, the switching operation unit 343 switches the display mode of the display unit 342. The display modes will be described in detail later.

For convenience, in the following explanation, the playback speed operation unit 34, dial 341, display unit 342 and switching operation unit 343 of the first channel operation unit 3A will be referred to as the first playback speed operation unit 34A, first dial 341A, first display unit 342A and first switching operation unit 343A, and the playback speed operation unit 34, dial 341, display unit 342 and switching operation unit 343 of the second channel operation unit 3B will be referred to as the second playback speed operation unit 34B, second dial 341B, second display unit 342B and second switching operation unit 343B.

The crossfader 4 has an operator 41 that can move left and right. As the operator 41 is moved to the left, the proportion of the volume of the first channel in the volume output from the sound control device 1 increases. Also, as the operator 41 is moved to the right, the proportion of the volume of the second channel in the volume output from the sound control device 1 increases.

[Configuration of control unit]
FIG. 2 is a block diagram showing the configuration of the control unit 5.
The control unit 5 is configured by a circuit board having a processing unit such as a CPU (Central Processing Unit). As described above, the control unit 5 controls the operation of the acoustic control device 1. Specifically, the control unit 5 not only plays the music loaded on each channel, but also adjusts the playback speed of the music based on the operating state of the dial 341.
As shown in FIG. 2, the control unit 5 has a first playback unit 51, a first adjustment unit 52, a first control unit 53, a second playback unit 54, a second adjustment unit 55, a second control unit 56, a mode switching unit 57, and a display control unit 58.

The first playback unit 51 plays back the first music piece loaded on the first channel.
The first adjustment unit 52 corresponds to an adjustment unit that adjusts the playback speed of the first music piece. The first adjustment unit 52 adjusts the playback state of the first music piece in response to a user's operation on the first channel operation unit 3A. For example, the first adjustment unit 52 adjusts the playback speed and playback direction of the first music piece being played by the first playback unit 51 in response to a user's operation on the jog dial 31 of the first channel operation unit 3A. Furthermore, for example, the first adjustment unit 52 adjusts the BPM of the first music piece being played by the first playback unit 51 based on the rotation state of the first dial 341A, thereby adjusting the playback speed of the first music piece.

The first control unit 53 controls the playback of the first music data by the first playback unit 51 and the output of the music obtained by playing the first music data. For example, the first control unit 53 causes the first playback unit 51 to play the first music in the playback state adjusted by the first adjustment unit 52. The first control unit 53 also controls the output of the music obtained by playing the first music by the first playback unit 51 in accordance with the user's operation of the equalizer adjustment unit 32 of the first channel operation unit 3A.

The second playback unit 54 plays the second music piece loaded on the second channel.
The second adjustment unit 55 corresponds to an adjustment unit that adjusts the playback speed of the second music piece. Similar to the first adjustment unit 52, the second adjustment unit 55 adjusts the playback state of the second music piece data in response to a user's operation on the second channel operation unit 3B. For example, the second adjustment unit 55 adjusts the BPM of the second music piece played by the second playback unit 54 based on the rotation state of the second dial 341B, thereby adjusting the playback speed of the second music piece.
Similar to the first control unit 53, the second control unit 56 controls the reproduction of the second music piece by the second reproduction unit 54 and the output of the music piece obtained by reproducing the second music piece.

The mode switching unit 57 switches the display mode of the first display unit 342A in response to an operation on the first switching operation unit 343A. The mode switching unit 57 also switches the display mode of the second display unit 342B in response to an operation on the second switching operation unit 343B. In other words, the display modes are set individually for the first channel operation unit 3A and the second channel operation unit 3B.
The display modes that can be switched by the mode switching unit 57 include a direct display mode, a ratio display mode, a graphic display mode, and a slider display mode. These display modes will be described in detail later.

The display control unit 58 causes the first display unit 342A to display information regarding the playback speed of the first song adjusted by the first adjustment unit 52. More specifically, the display control unit 58 causes the first display unit 342A to display information regarding the BPM corresponding to the playback speed of the first song. The display control unit 58 also causes the second display unit 342B to display information regarding the playback speed of the second song adjusted by the second adjustment unit 55. More specifically, the display control unit 58 causes the second display unit 342B to display information regarding the BPM corresponding to the playback speed of the second song. The content displayed by each display unit 342A, 342B differs depending on the display mode of each channel operation unit 3.

The following describes the display content for each display mode on the display unit 342. In the following description, the display content on the first display unit 342A will be described, but the display content on the second display unit 342B is similar.
Furthermore, the BPM inherent to a song, i.e., the BPM of the song before the playback speed is adjusted, is referred to as the original BPM, and the BPM of the song after the playback speed has been adjusted is referred to as the adjusted BPM. Therefore, the BPM inherent to the first song is referred to as the first original BPM, and the BPM of the first song after the playback speed has been adjusted by the first adjustment unit 52 is referred to as the first adjusted BPM.
Furthermore, the ratio of the adjusted BPM to the original BPM is referred to as the "adjusted ratio." Therefore, the ratio of the first adjusted BPM to the first original BPM is referred to as the "first adjusted ratio." The adjusted ratio is a value expressed as a percentage (%).

[Direct display mode]
FIG. 3 is a diagram showing an example of the display content of the first display section 342A in the direct display mode.
3, the direct display mode is a display mode in which the first display unit 342A displays the first original BPM and the first adjusted BPM. That is, in the direct display mode, the display control unit 58 causes the first display unit 342A to display the first original BPM and the first adjusted BPM. For this reason, the screen DP1 displayed on the first display unit 342A in the direct display mode is provided with an original BPM display section DP11 that displays the first original BPM and an adjusted BPM display section DP12 that displays the first adjusted BPM.

[Percentage display mode]
FIG. 4 is a diagram showing an example of the display content of the first display section 342A in the ratio display mode.
4, the percentage display mode is a display mode in which the first display unit 342A displays the first original BPM and the ratio of the first adjusted BPM to the first original BPM (first adjusted ratio). That is, in the percentage display mode, the display control unit 58 causes the first display unit 342A to display the first original BPM and the first adjusted ratio. Therefore, the screen DP2 displayed on the first display unit 342A in the percentage display mode is provided with an original BPM display unit DP11 and a ratio display unit DP22 that displays the first adjusted ratio. Note that the ratio displayed in the percentage display mode is an example of information indicating the ratio of the BPM of the song after playback speed adjustment to the BPM inherent to the song.

[Graphic display mode]
FIG. 5 is a diagram showing an example of the display content of the first display section 342A in the graphic display mode.
The graphic display mode is a display mode in which the first display section 342A displays the first original BPM and one of the graphics FG1 and FG2, as shown in Fig. 5. The graphics FG1 and FG2 are graphics corresponding to the comparison result between the first original BPM and the first adjusted BPM. More specifically, the graphics FG1 and FG2 are graphics indicating the magnitude relationship between the first original BPM and the first adjusted BPM, with the graphic FG1 being an upward-pointing triangle and the graphic FG2 being a downward-pointing triangle.
For this reason, the screen DP3 displayed on the first display section 342A in the figure display mode is provided with an original BPM display section DP11 and a figure display section DP31 that displays the figures FG1 and FG2.

[When the first adjusted BPM is greater than the first original BPM]
FIG. 6 is a diagram illustrating the relationship between the first adjusted ratio and the displayed graphics FG1 and FG2.
In the graphic display mode, when the first adjusted BPM is greater than the first original BPM, the display control unit 58 displays a graphic FG1 in the first display section 342A, but does not display a graphic FG2, as shown in Fig. 6. In other words, the graphic FG1 is a graphic indicating that the first adjusted BPM is greater than the first original BPM.
In this case, if the first adjusted ratio is greater than 100% and less than the first threshold, the display control unit 58 minimizes the brightness of the graphic FG1 displayed on the first display unit 342A. The first threshold is a value greater than 100%, and is 110% in this embodiment. However, the first threshold can be changed as appropriate.

Furthermore, when the first post-adjustment ratio is equal to or greater than the first threshold value and less than the second threshold value, the display control unit 58 increases the brightness of the graphic FG1 displayed on the first display unit 342A. That is, the brightness of the graphic FG1 displayed when the first post-adjustment ratio is equal to or greater than the first threshold value and less than the second threshold value is higher than the brightness of the graphic FG1 displayed when the first post-adjustment ratio is greater than 100% and less than the first threshold value. The second threshold value is a value greater than the first threshold value, and in this embodiment, the second threshold value is 120%. However, the second threshold value can be changed as appropriate.
Furthermore, when the first post-adjustment ratio is equal to or greater than the second threshold, the display control unit 58 maximizes the brightness of the graphic FG1 displayed on the first display portion 342A.
That is, the brightness of the graphic FG1 displayed when the first adjusted ratio is greater than 100% increases as the difference between the first original BPM and the first adjusted BPM increases, and decreases as the difference between the first original BPM and the first adjusted BPM decreases. In other words, the brightness of the graphic FG1 decreases as the first adjusted BPM approaches the first original BPM, and increases as the first adjusted BPM moves away from the first original BPM.
Such a difference in brightness of the graphic FG1 is an example of information indicating the ratio of the BPM of the music piece after the playback speed adjustment to the BPM inherent in the music piece.

[When the first adjusted BPM is smaller than the first original BPM]
In the graphic display mode, if the first adjusted BPM is smaller than the first original BPM, the display control unit 58 displays the downward-pointing triangle FG2 on the first display unit 342A, and does not display the upward-pointing triangle FG1. In other words, the graphic FG2 is a graphic indicating that the first adjusted BPM is smaller than the first original BPM.
In this case, if the first adjusted ratio is greater than the third threshold but less than 100%, the display control unit 58 minimizes the brightness of the figure FG2. The third threshold is a value less than 100%, and is 90% in this embodiment. However, the third threshold can be changed as needed.

Furthermore, when the first post-adjustment ratio is equal to or less than the third threshold but greater than the fourth threshold, the display control unit 58 increases the brightness of the figure FG2. That is, the brightness of the figure FG2 displayed when the first post-adjustment ratio is greater than the fourth threshold but less than the third threshold is higher than the brightness of the figure FG2 displayed when the first post-adjustment ratio is greater than the third threshold but less than 100%. The fourth threshold is a value smaller than the third threshold, and is 80% in this embodiment. However, the fourth threshold can be changed as appropriate.
Furthermore, when the first adjusted ratio is equal to or less than the fourth threshold, the display control unit 58 maximizes the brightness of the graphic FG2.
That is, the brightness of the graphic FG2 displayed when the first adjusted ratio is smaller than 100% increases as the difference between the first original BPM and the first adjusted BPM increases, and decreases as the difference between the first original BPM and the first adjusted BPM decreases. In other words, the brightness of the graphic FG2 decreases as the first adjusted BPM approaches the first original BPM, and increases as the first adjusted BPM moves away from the first original BPM.
Such a difference in brightness of the graphic FG2 is an example of information indicating the ratio of the BPM of the music piece after the playback speed adjustment to the BPM inherent in the music piece.

[When the first adjusted BPM is the same as the first original BPM]
When the first adjusted BPM is the same value as the first original BPM, the graphics FG1 and FG2 are not displayed, as shown in FIG.
As described above, by checking the cases where the graphic FG1 is displayed, the graphic FG2 is displayed, and the graphic FG1 and the graphic FG2 are not displayed, the user can intuitively grasp the magnitude of the first adjusted BPM relative to the first original BPM. In addition, the user can intuitively grasp the first adjusted ratio.

In this embodiment, the brightness of the figures FG1 and FG2 increases as the difference between the original BPM and the adjusted BPM increases. In other words, the brightness of the figures FG1 and FG2 decreases as the adjusted BPM approaches the original BPM. This makes it easier for the user to understand that the adjusted BPM is a value that is different from the original BPM.
On the other hand, the brightness of the figures FG1 and FG2 may increase as the difference between the original BPM and the adjusted BPM decreases, and decrease as the difference between the original BPM and the adjusted BPM increases. Specifically, the brightness of the figure FG1 displayed when the first post-adjustment ratio is greater than 100% may be highest when the first post-adjustment ratio is smaller than a first threshold value and lowest when the first post-adjustment ratio is equal to or greater than a second threshold value. Similarly, the brightness of the figure FG2 displayed when the first post-adjustment ratio is less than 100% may be highest when the first post-adjustment ratio is greater than a third threshold value and lowest when the first post-adjustment ratio is equal to or less than a fourth threshold value. In this case, when a difference occurs between the first original BPM and the first adjusted BPM from a state in which the first original BPM and the first adjusted BPM are the same, the figure FG1 or the figure FG2 is displayed with high brightness, making it easier for the user to determine whether the first original BPM and the first adjusted BPM are the same.

[Slider display mode]
FIG. 7 is a diagram showing an example of the display content of the first display portion 342A in the slider display mode.
7, the slider display mode is a display mode in which the first display section 342A displays the first original BPM and a graphic FG3 as a graphic corresponding to the comparison result between the first original BPM and the first adjusted BPM. The graphic FG3 is a graphic corresponding to the comparison result between the first original BPM and the first adjusted BPM. More specifically, the graphic FG3 is a graphic indicating the magnitude relationship between the first original BPM and the first adjusted BPM.
The screen DP4 displayed on the first display section 342A in the slider display mode is provided with an original BPM display section DP11 and a figure display section DP41 that displays the figure FG3.

The graphic FG3 is a graphic representing a slider with a slide operator positioned within a predetermined slide range at a position corresponding to the first adjusted ratio. More specifically, the graphic FG3 includes a first reference line FG31, a second reference line FG32, a slide operator FG33, and a range display portion FG34. In other words, the graphic FG3 is a graphic that resembles a tempo slider.
The first reference line FG31 is a straight line extending in the vertical direction, and defines the sliding range of the slide operator FG33.
The second reference line FG32 extends in a direction intersecting with the first reference line FG31 at the center of the first reference line FG31. The second reference line FG32 is a scale indicating "100%."

The slide operator FG33 slides up and down along the first reference line FG31 to indicate the first post-adjustment ratio.
When the first adjusted ratio is 100%, that is, when the first original BPM and the first adjusted BPM are the same value, the display control unit 58 positions the slide operator FG33 on the second reference line FG32.
When the first adjusted BPM is smaller than the first original BPM, the display control unit 58 positions the slide operator FG33 above the second reference line FG32.
When the first adjusted BPM is greater than the first original BPM, the display control unit 58 positions the slide operator FG33 below the second reference line FG32.
In this way, the magnitude relationship between the first original BPM and the first adjusted BPM is indicated by the position of the slide operator FG33 relative to the second reference line FG32. In this respect, the graphic FG3 is a graphic that indicates the magnitude relationship between the first original BPM and the first adjusted BPM, as described above.

The range display section FG34 displays the range of the first adjusted ratio indicated by the slide operator FG33 slidably arranged on the first reference line FG31.
Here, the range of the first post-adjustment ratio indicated by the slide operator FG33 arranged on the first reference line FG31 is changed according to the first post-adjustment ratio. That is, the minimum value defined by the upper end of the first reference line FG31 and the maximum value defined by the lower end of the first reference line FG31 are changed according to the first post-adjustment ratio.

Specifically, if the first adjusted ratio is a value within the range of 94% or more and 106% or less, the display control unit 58 sets the range of the first adjusted ratio defined by the first reference line FG31 to a range of 94% or more and 106% or less. In this case, the minimum value defined by the upper end of the first reference line FG31 is 94%, and the maximum value defined by the lower end of the first reference line FG31 is 106%. In this case, "6%" is displayed in the range display unit FG34.

If the first adjusted ratio is a value in the range of 90% or more and less than 94%, or a value in the range of greater than 106% and less than 110%, the display control unit 58 sets the range of the first adjusted ratio defined by the first reference line FG31 to a range of 90% or more and 110% or less. In this case, the minimum value defined by the upper end of the first reference line FG31 is 90%, and the maximum value defined by the lower end of the first reference line FG31 is 110%. In this case, "10%" is displayed in the range display unit FG34.

If the first adjusted ratio is a value in the range of 84% or more and less than 90%, or a value in the range of greater than 110% and less than 116%, the display control unit 58 sets the range of the first adjusted ratio defined by the first reference line FG31 to a range of 84% or more and 116% or less. In this case, the minimum value defined by the upper end of the first reference line FG31 is 84%, and the maximum value defined by the lower end of the first reference line FG31 is 116%. In this case, "16%" is displayed in the range display unit FG34.

If the first post-adjustment ratio is a value within the range of 0% or more and less than 84%, or a value within the range of more than 116% and less than or equal to 200%, the display control unit 58 sets the range of the first post-adjustment ratio defined by the first reference line FG31 to a range of 0% or more and 200% or less. In this case, the minimum value defined by the upper end of the first reference line FG31 is 0%, and the maximum value defined by the lower end of the first reference line FG31 is 200%. In this case, "100%" is displayed in the range display unit FG34.
If the first post-adjustment ratio is greater than 200%, the display control unit 58 may display a graphic indicating an error in the graphic display section DP41 instead of the graphic FG3.

In this way, by checking the position of the slide operator FG33, which slides along the first reference line FG31 according to the first adjusted ratio, and the range displayed in the range display section FG34, the magnitude relationship between the first original BPM and the first adjusted BPM, as well as the first adjusted ratio, can be intuitively grasped. In other words, the information shown by the graphic FG3 is an example of information indicating the ratio of the BPM of the song after playback speed adjustment to the BPM specific to the song.

[Effects of the first embodiment]
The acoustic control device 1 according to the present embodiment described above provides the following effects.
The sound control device 1 is capable of adjusting the playback speed of a piece of music. The sound control device 1 includes a display control unit 58 that displays graphics FG1, FG2, and FG3 according to the comparison result between an original BPM, which is a BPM specific to a piece of music, and an adjusted BPM, which is the BPM of the piece of music after the playback speed has been adjusted.
With this configuration, the user can easily understand the magnitude relationship between the original BPM and the adjusted BPM by checking the displayed graphics FG1, FG2, and FG3.

In the sound control device 1, the figures FG1, FG2, and FG3 are figures that indicate the magnitude relationship between the original BPM and the adjusted BPM.
According to this configuration, by checking the displayed graphic, the user can more easily grasp the magnitude relationship between the original BPM and the adjusted BPM.

In the sound control device 1, the brightness of the graphics FG1 and FG2 differs depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the ratio of the adjusted BPM to the original BPM can be easily grasped by checking the brightness of the displayed graphics FG1 and FG2.

In the sound control device 1, the brightness of the figures FG1 and FG2 increases as the difference between the original BPM and the adjusted BPM increases. In other words, the brightness of the figures FG1 and FG2 decreases as the adjusted BPM approaches the original BPM.
According to this configuration, by checking the brightness of the graphics FG1 and FG2, the user can easily visually grasp the difference between the first original BPM and the first adjusted BPM.
As described above, in the sound control device 1, the brightness of the figures FG1 and FG2 may be decreased as the difference between the original BPM and the adjusted BPM increases. In other words, the brightness of the figures FG1 and FG2 may be increased as the adjusted BPM approaches the original BPM.
Even with this configuration, by checking the brightness of the graphics FG1 and FG2, the user can easily visually grasp the difference between the original BPM and the adjusted BPM.

In the sound control device 1, the graphic FG3 is a slider in which a slide operator FG33 is arranged at a position according to the ratio of the adjusted BPM to the original BPM within a predetermined slide range.
With this configuration, by checking the position of the slide operator FG33, the ratio of the adjusted BPM to the original BPM can be easily grasped.

In the sound control device 1, the range of the ratio of the adjusted BPM to the original BPM, which is indicated by the first reference line FG31 that defines the slide range, may differ depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the slide range changes according to the difference between 100% and the ratio of the adjusted BPM to the original BPM, for example, making it easier to grasp the ratio of the adjusted BPM to the original BPM from the position of the slide operator within a limited display range.

The acoustic control apparatus 1 includes a display unit 342 that is controlled by the display control unit 58 and displays the graphics FG1, FG2, and FG3.
With this configuration, the user can easily check the graphics FG1, FG2, and FG3, and can easily grasp the magnitude relationship between the original BPM and the adjusted BPM.

[Modification of the first embodiment]
In the above-described acoustic control device 1, when the display mode is the graphic display mode, the brightness of the graphics FG1 and FG2 is changed in accordance with the first post-adjustment ratio. However, this is not limiting, and at least one of the brightness, color, and blinking cycle of the graphics FG1 and FG2 may be changed in accordance with the first post-adjustment ratio.

FIG. 8 is a diagram illustrating the relationship between the first adjusted ratio and the graphics FG1 and FG2 displayed when the display mode is the graphics display mode.
For example, when the display mode is the graphics display mode, graphics FG1 and FG2 may be displayed as shown in FIG.
That is, when the first post-adjustment ratio is greater than 100% and less than a first threshold (e.g., 110%), the display control unit 58 changes the color of the figure FG1 to red. When the first post-adjustment ratio is equal to or greater than the first threshold and less than a second threshold (e.g., 120%), the display control unit 58 changes the color of the figure FG1 to orange. When the first post-adjustment ratio is equal to or greater than the second threshold, the display control unit 58 changes the color of the figure FG1 to yellow.

Furthermore, if the first post-adjustment ratio is greater than a third threshold (e.g., 90%) but less than 100%, the display control unit 58 changes the color of the figure FG2 to blue-green. If the first post-adjustment ratio is equal to or less than the third threshold and greater than a fourth threshold (e.g., 80%), the display control unit 58 changes the color of the figure FG2 to blue. If the first post-adjustment ratio is equal to or less than the fourth threshold, the display control unit 58 changes the color of the figure FG2 to blue-purple.
If the first adjusted BPM is the same as the first original BPM, the graphics FG1 and FG2 are not displayed, as in the above.

In this way, in the sound control device 1, the colors of the graphics FG1 and FG2 may differ depending on the post-adjustment ratio.
With this configuration, the adjusted ratio can be easily grasped by checking the colors of the graphics FG1 and FG2.
Furthermore, when the adjusted ratio exceeds 100%, the color of the figure FG1 is made warm, and when the adjusted ratio is less than 100%, the color of the figure FG2 is made cool, so that the user can more intuitively grasp the relationship in magnitude between the original BPM and the adjusted BPM.
The relationship between the adjusted ratio and the color of the graphics FG1 and FG2 is not limited to the above, and the colors of the graphics FG1 and FG2 may be other colors.

FIG. 9 is a diagram for explaining the relationship between the adjusted ratio and the graphics FG1 and FG2 to be displayed when the display mode is the graphics display mode.
For example, when the display mode is the graphics display mode, graphics FG1 and FG2 may be displayed as shown in FIG.
That is, when the post-adjustment ratio is greater than 100% and less than a first threshold (e.g., 110%), the display control unit 58 sets the blinking cycle of the figure FG1 to a large value. When the post-adjustment ratio is equal to or greater than the first threshold and less than a second threshold (e.g., 120%), the display control unit 58 sets the blinking cycle of the figure FG1 to a smaller value than the blinking cycle when the post-adjustment ratio is greater than 100% and less than the first threshold. When the post-adjustment ratio is equal to or greater than the second threshold, the display control unit 58 sets the blinking cycle of the figure FG1 to the smallest value. Note that a large blinking cycle indicates a low blinking frequency and a low blinking frequency, and a small blinking cycle indicates a high blinking frequency and a high blinking frequency.

Furthermore, when the post-adjustment ratio is greater than a third threshold (e.g., 90%) and less than 100%, the display control unit 58 increases the blinking period of the graphic FG2. When the post-adjustment ratio is equal to or less than the third threshold and greater than a fourth threshold (e.g., 80%), the display control unit 58 decreases the blinking period of the graphic FG2 compared to when the post-adjustment ratio is greater than the third threshold and less than 100%. When the post-adjustment ratio is equal to or less than the fourth threshold, the display control unit 58 decreases the blinking period of the graphic FG2 to its smallest value.
In this way, as the difference between the original BPM and the adjusted BPM increases, the blinking cycle of the figures FG1 and FG2 decreases and the blinking frequency of the figures FG1 and FG2 increases. In other words, as the difference between the original BPM and the adjusted BPM decreases, the blinking cycle of the figures FG1 and FG2 increases and the blinking frequency of the figures FG1 and FG2 decreases.
If the adjusted BPM is the same as the original BPM, the graphics FG1 and FG2 are not displayed, as in the above.

In this way, in the sound control device 1, the blinking cycles of the graphics FG1 and FG2 may differ depending on the adjusted ratio.
With this configuration, the adjusted ratio can be easily grasped by checking the blinking cycle of the graphics FG1 and FG2.
Furthermore, by increasing the blinking cycle of the figures FG1 and FG2 as the difference between the original BPM and the adjusted BPM becomes smaller and the adjusted ratio approaches 100%, the user can more easily grasp the adjusted ratio. In other words, by decreasing the blinking cycle of the figures FG1 and FG2 as the difference between the original BPM and the adjusted BPM becomes larger and the adjusted ratio moves away from 100%, the user can more easily grasp the adjusted ratio.

The relationship between the adjusted ratio and the blinking cycle of the figures FG1 and FG2 is not limited to the above. For example, the blinking cycle of the figures FG1 and FG2 may be decreased as the adjusted ratio approaches 100%. In other words, the blinking cycle of the figures FG1 and FG2 may be decreased to increase the blinking frequency of the figures FG1 and FG2 as the difference between the original BPM and the adjusted BPM decreases. Furthermore, the blinking cycle of the figures FG1 and FG2 may be increased to decrease the blinking frequency of the figures FG1 and FG2 as the difference between the original BPM and the adjusted BPM increases. Note that when the original BPM and the adjusted BPM match, the figures FG1 and FG2 are turned off instead of being lit.
With this configuration, the user can easily understand that the original BPM and the adjusted BPM match by checking that the figures FG1 and FG2, which were flashing at a high flashing frequency, are now turned off.

Second Embodiment
Next, a second embodiment of the present invention will be described.
The sound control device according to this embodiment has the same configuration as the sound control device 1 according to the first embodiment, but differs in that a display unit that shows the ratio of the adjusted BPM to the original BPM is provided on the dial. In the following explanation, parts that are the same or approximately the same as parts that have already been explained will be assigned the same reference numerals and explanations thereof will be omitted.

[General configuration of the acoustic control device]
FIG. 10 is a schematic diagram showing a dial 344 provided in the acoustic control device according to this embodiment.
The acoustic control device according to this embodiment has the same configuration and functions as the acoustic control device 1 according to the first embodiment, except that it has a dial 344 and a ratio display unit 345 shown in Fig. 10 instead of the dial 341 according to the first embodiment. That is, in this embodiment, the playback speed operation unit 34 has the dial 344, a display unit 342, a switching operation unit 343, and a ratio display unit 345.

[Dial Configuration]
The dial 344, like the dial 341, is rotatable clockwise and counterclockwise when viewed from a position facing the top surface 21, and accepts an operation to adjust the playback speed of music. The dial 344 is provided with a ratio display section 345.

[Configuration of the ratio display section]
The ratio display unit 345 displays the adjusted ratio under the control of the display control unit 58. The ratio display unit 345 is made up of a plurality of light-emitting elements 346 arranged along the direction in which the dial 344 rotates.
The ratio display section 345 has a first area 345A which is an area extending halfway around the dial 344 in a clockwise direction from a base point BP, and a second area 345B which is an area extending halfway around the dial 344 in a counterclockwise direction from the base point BP.
The first area 345A is an area for displaying the adjusted ratio when the adjusted BPM is greater than the original BPM. More specifically, the first area 345A is an area for displaying the adjusted ratio when the adjusted ratio is greater than 100% and less than 200%.
The second area 345B is an area for displaying the adjusted ratio when the adjusted BPM is smaller than the original BPM. More specifically, the second area 345B is an area for displaying the adjusted ratio when the adjusted ratio is greater than 0% and less than 100%.
The base point BP is set at the intersection of the virtual line VL extending upward from the rotation axis Rx of the dial 344 and the circumferential direction centered on the rotation axis Rx of the dial 344. As described above, the dial 344 is rotatable around the rotation axis Rx, and therefore the position of the base point BP is constantly updated by the display control unit 58 whenever the dial 344 is rotated.

[Functions of the ratio display section]
Fig. 11 is a diagram showing an example of the display mode of the ratio display section 345. Specifically, Fig. 11 is a diagram showing the ratio display section 345 when the adjusted ratio is 130%.
The display control unit 58 lights up a number of light-emitting elements 346 corresponding to the adjusted ratio out of the plurality of light-emitting elements 346 included in the ratio display unit 345, thereby displaying the adjusted ratio on the ratio display unit 345. In detail, when the adjusted BPM is larger than the original BPM, the display control unit 58 lights up a number of light-emitting elements 346 corresponding to the difference between 100% and the adjusted ratio out of the plurality of light-emitting elements 346 arranged in the first region 345A, starting from the base point BP, thereby displaying the adjusted ratio.
For example, if the adjusted ratio is 130%, the display control unit 58 displays the adjusted ratio on the ratio display unit 345 by lighting up, from the base point BP, a number of light-emitting elements 346 out of the plurality of light-emitting elements 346 arranged in the first area 345A, which corresponds to 30%, which is the difference between 100% and the adjusted ratio, as shown in FIG. 11 .

Fig. 12 is a diagram showing an example of the display mode of the ratio display section 345. Specifically, Fig. 12 is a diagram showing the ratio display section 345 when the adjusted ratio is 80%.
Furthermore, when the adjusted BPM is smaller than the original BPM, the display control unit 58 displays the adjusted ratio by lighting up, from the base point BP, a number of light-emitting elements 346 out of the plurality of light-emitting elements 346 arranged in the second region 345B that corresponds to the difference between 100% and the adjusted ratio.
For example, if the adjusted ratio is 80%, the display control unit 58 displays the adjusted ratio on the ratio display unit 345 by lighting up, from the base point BP, a number of light-emitting elements 346 out of the plurality of light-emitting elements 346 arranged in the second region 345B, corresponding to 20%, which is the difference between 100% and the adjusted ratio, as shown in FIG. 12 .

In this way, by displaying the adjusted ratio in either the first clockwise region 345A or the second counterclockwise region 345B centered on the base point BP, the user can intuitively grasp the adjusted ratio.
The light emitting elements 346 arranged in the first region 345A may emit light in different colors from the light emitting elements 346 arranged in the second region 345B. For example, the light emitting elements 346 that are turned on when the adjusted BPM is higher than the original BPM may emit red light, which is a warm color, and the light emitting elements 346 that are turned on when the adjusted BPM is lower than the original BPM may emit blue light, which is a cool color. Furthermore, the light emitting elements 346 may flash at a frequency corresponding to the adjusted ratio, as in the modification of the first embodiment.

[Effects of the second embodiment]
The acoustic control device according to this embodiment described above has the same effects as the acoustic control device 1 according to the first embodiment, and also has the following effects.
The acoustic control device according to this embodiment includes a dial 344, a first adjustment unit 52, a second adjustment unit 55, and a ratio display unit 345. The dial 344 is rotatable about a rotation axis Rx. The first adjustment unit 52 adjusts the playback speed of music on the first channel based on a rotation operation of the dial 344 provided on the first channel operation unit 3A as a first dial. The second adjustment unit 55 adjusts the playback speed of music on the second channel based on a rotation operation of the dial 344 provided on the second channel operation unit 3B as a second dial. The first adjustment unit 52 and the second adjustment unit 55 correspond to adjustment units. The ratio display unit 345 includes a plurality of light-emitting elements 346 provided along the rotation direction of the dial 344. The display control unit 58 controls the lighting state of each of the plurality of light-emitting elements 346 to cause the plurality of light-emitting elements 346 to display the ratio of the adjusted BPM to the original BPM.
With this configuration, the user operating the dial 344 can easily check the adjusted ratio displayed by the plurality of light-emitting elements 346 .

In the acoustic control device according to this embodiment, when the post-adjustment ratio is greater than 100%, the display control unit 58 lights up a number of light-emitting elements 346 corresponding to the post-adjustment ratio out of the plurality of light-emitting elements 346 arranged clockwise from a base point BP provided in the circumferential direction of the dial 344. Furthermore, when the post-adjustment ratio is less than 100%, the display control unit 58 lights up a number of light-emitting elements 346 corresponding to the post-adjustment ratio out of the plurality of light-emitting elements 346 arranged counterclockwise from the base point BP.
With this configuration, by checking which of the light emitting elements 346 arranged clockwise from the base point BP and the light emitting elements 346 arranged counterclockwise from the base point BP are lit, it is possible to easily grasp the magnitude relationship between the original BPM and the adjusted BPM. In addition, by checking the range in which the lit light emitting elements 346 are arranged, it is possible to grasp the ratio of the adjusted BPM to the original BPM.

In the acoustic control device according to this embodiment, a plurality of light emitting elements 346 are provided on the dial 344 .
With this configuration, it is possible to prevent the lighting state of the light emitting element 346 from becoming difficult to check due to the finger operating the dial 344 .

[Modification of the second embodiment]
FIG. 13 shows another arrangement of the ratio display section 345.
The ratio display unit 345 described above is provided on the dial 344. However, the present invention is not limited to this and may be provided in other locations.
For example, as shown in FIG. 13, a plurality of light emitting elements 346 constituting a ratio display unit 345 may be provided around a dial 341 on the top surface 21 of the housing 2 .
With this configuration, the plurality of light-emitting elements 346 are fixed to the housing 2, so the base point BP can be fixed. This makes it easier to grasp the first region 345A clockwise from the base point BP and the second region 345B counterclockwise from the base point BP. Therefore, the magnitude relationship between the original BPM and the adjusted BPM can be easily grasped, and the adjusted ratio can be grasped by checking the arrangement range of the light-emitting elements 346 that are turned on.
In addition, since the base point BP can be fixed, the process of calculating the position of the base point BP on the dial 344 that is rotated can be omitted.

[Modification of the embodiment]
The present invention is not limited to the above-described embodiments, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention.

FIG. 14 is a schematic diagram showing an acoustic control device 1A, which is a modification of the acoustic control device 1. As shown in FIG.
In each of the above embodiments, a playback speed operation unit 34 is provided for each channel operation unit 3. However, this is not limited to this. For example, as in the audio control device 1A shown in FIG. 14 , a single playback speed operation unit 34 may be provided for the entire audio control device. In this case, the control unit 5 simultaneously adjusts the playback speeds of the music on all channels in response to operations on the playback speed operation unit 34. In this case, the control unit 5 may increase or decrease the BPM of the music on all channels during playback by the same amount, or may increase or decrease the BPM of the music on all channels during playback by the same rate, in response to the rotation state of the single playback speed operation unit 34. When such playback speed operation units 34 are provided, the first channel operation unit 3A may be provided with a tempo slider 35 that can adjust only the playback speed of the music on the first channel, and the second channel operation unit 3B may be provided with a tempo slider 35 that can adjust only the playback speed of the music on the second channel.

In the above embodiments, figure FG1 is an upward-facing triangle, and figure FG2 is a downward-facing triangle. However, this is not limited to this, and one of figures FG1 and FG2 may be a right-facing triangle and the other a left-facing triangle. Furthermore, figures FG1 and FG2 may point in opposite directions, for example, arrows or other polygonal shapes. In other words, the figure displayed on the display unit 342 by the display control unit 58 may be a figure corresponding to the comparison result between the original BPM and the adjusted BPM, and the shape and size of the figure are not important.

In each of the above embodiments, the brightness of figures FG1 and FG2 varies depending on the ratio of the adjusted BPM to the original BPM (adjusted ratio). However, this is not limited to this, and the brightness of figures FG1 and FG2 may be constant regardless of the adjusted ratio. Similarly, the color and blinking cycle of figures FG1 and FG2 may also be constant regardless of the adjusted ratio. Furthermore, figures may be displayed by combining at least two of the brightness, color, and blinking cycle.

In the above embodiments, the range of the adjusted ratio indicated by the first reference line FG31, which defines the slide range within which the slide operator FG33 can slide, for the figure FG3 varies depending on the adjusted ratio. However, this is not limited to this, and the range of the adjusted ratio indicated by the slide range may be constant.

In each of the above embodiments, the sound control device 1, 1A is provided with a display unit 342 on which figures FG1, FG2, FG3, etc. are displayed. However, this is not limited to this, and the display unit 342 does not necessarily have to be provided. For example, even if the sound control device itself does not have a display unit, an external device connected to the sound control device may have a display unit that displays figures, etc.

In the second embodiment described above, the light-emitting elements 346 that constitute the ratio display unit 345 are arranged around the entire circumference of the dial 344 in the direction of rotation of the dial 344. However, this is not limited to this, and the range in which the light-emitting elements 346 are arranged can be changed as appropriate. The same applies when the light-emitting elements 346 are arranged around the periphery of the dial 344.

In the second embodiment, the plurality of light-emitting elements 346 provided in the first region 345A, which is a region clockwise from the base point BP, display the adjusted ratio when the adjusted BPM is greater than the original BPM. Also, the plurality of light-emitting elements 346 provided in the second region 345B, which is a region counterclockwise from the base point BP, display the adjusted ratio when the adjusted BPM is smaller than the original BPM. However, this is not limiting, and the plurality of light-emitting elements 346 provided in the first region 345A may display the adjusted ratio when the adjusted BPM is smaller than the original BPM. Similarly, the plurality of light-emitting elements 346 provided in the second region 345B may display the adjusted ratio when the adjusted BPM is greater than the original BPM.
Furthermore, the configuration in which the ratio display unit 345 is provided is not limited to the dial 344 and the housing 2, and can be changed as appropriate.

In the above embodiments, the display modes of the display unit 342 provided in each channel operation unit 3 include direct display mode, ratio display mode, graphic display mode, and slider display mode. However, the audio control device does not necessarily have to be configured to be able to set all of these display modes. For example, the audio control device may have at least one of the graphic display mode and the slider display mode as a switchable display mode.

In the above embodiments, the audio control device 1 or 1A is a mixer. However, the audio control device of the present disclosure is not limited to this, and may be another audio device such as a DJ controller or another electronic device.
Furthermore, the configuration and layout of the acoustic control devices 1 and 1A, which are mixers, are not limited to those shown in FIGS. 1 and 14, and can be changed as appropriate.

Summary of the Disclosure
A summary of this disclosure is provided below.
[1] An audio control device capable of adjusting the playback speed of a song includes a display control unit that displays a graphic according to the comparison result between an original BPM, which is a BPM specific to the song, and an adjusted BPM, which is the BPM of the song after the playback speed has been adjusted.
According to this configuration, by checking the displayed graphic, the user can easily understand the magnitude relationship between the original BPM and the adjusted BPM.

[2] In the sound control device described in [1], the graphic may be a graphic that indicates the magnitude relationship between the original BPM and the adjusted BPM.
According to this configuration, by checking the displayed graphic, the user can more easily grasp the magnitude relationship between the original BPM and the adjusted BPM.

[3] In the acoustic control device according to [1] or [2], the brightness of the graphic may be different depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the ratio of the adjusted BPM to the original BPM can be easily grasped by checking the brightness of the displayed graphic.

[4] In the acoustic control device according to any one of [1] to [3], the brightness of the graphic may increase as the difference between the original BPM and the adjusted BPM increases.
According to this configuration, by checking the brightness of the graphic, the user can easily visually grasp the difference between the original BPM and the adjusted BPM.

[5] In the acoustic control device according to any one of [1] to [3], the brightness of the graphic may decrease as the difference between the original BPM and the adjusted BPM increases.
According to this configuration, by checking the brightness of the graphic, the user can easily visually grasp the difference between the original BPM and the adjusted BPM.

[6] In the sound control device according to any one of [1] to [5], the color of the graphic may differ depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the ratio of the adjusted BPM to the original BPM can be easily grasped by checking the color of the graphic.

[7] In the acoustic control device according to any one of [1] to [6], the blinking period of the graphic may be different depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the ratio of the adjusted BPM to the original BPM can be easily grasped by checking the blinking period of the graphic.

[8] In the sound control device described in [1], the graphic may be a slider in which a slide operator is arranged at a position according to the ratio of the adjusted BPM to the original BPM within a predetermined slide range.
With this configuration, the ratio of the adjusted BPM to the original BPM can be easily grasped by checking the position of the slide operator.

[9] In the acoustic control device described in [8], the range of the ratio of the adjusted BPM to the original BPM indicated by the slide range may differ depending on the ratio of the adjusted BPM to the original BPM.
With this configuration, the slide range changes according to the difference between 100% and the ratio of the adjusted BPM to the original BPM, for example, making it easier to grasp the ratio of the adjusted BPM to the original BPM from the position of the slide operator within a limited display range.

[10] The acoustic control device according to any one of [1] to [9] may further include a display unit that is controlled by the display control unit and displays the graphic.
With this configuration, the user can easily check the graphic, and in turn can easily grasp the magnitude relationship between the original BPM and the adjusted BPM.

[11] In the acoustic control device described in any one of [1] to [10], it may comprise a dial rotatable around a rotation axis, an adjustment unit that adjusts the playback speed of the music based on a rotation operation on the dial, and a plurality of light-emitting elements arranged along the rotation direction of the dial, and the display control unit may control the lighting state of each of the plurality of light-emitting elements to display the ratio of the adjusted BPM to the original BPM on the plurality of light-emitting elements.
With this configuration, the user operating the dial can easily check the ratio displayed by the plurality of light-emitting elements.

[12] In the acoustic control device described in [11], when the ratio is greater than 100%, the display control unit may light up a number of light-emitting elements corresponding to the ratio out of the plurality of light-emitting elements arranged clockwise from a base point provided circumferentially around the dial, and when the ratio is less than 100%, may light up a number of light-emitting elements corresponding to the ratio out of the plurality of light-emitting elements arranged counterclockwise from the base point.
With this configuration, by checking which of the light emitting elements arranged clockwise from the base point or the light emitting elements arranged counterclockwise from the base point are lit, it is possible to easily grasp the magnitude relationship between the original BPM and the adjusted BPM. In addition, by checking the arrangement range of the lit light emitting elements, it is possible to grasp the ratio of the adjusted BPM to the original BPM.

[13] In the acoustic control device described in [11] or [12], the plurality of light-emitting elements may be provided on the dial.
With this configuration, it is possible to prevent the lighting state of the light-emitting element from becoming difficult to check due to the finger operating the dial.

[14] The acoustic control device according to [11] or [12] may further include a housing in which the dial is provided, and the plurality of light-emitting elements may be provided around the dial on the housing.
With this configuration, the plurality of light-emitting elements are fixed to the housing, so the base point can be fixed. This makes it easy to grasp the area clockwise from the base point and the area counterclockwise from the base point. Therefore, the magnitude relationship between the original BPM and the adjusted BPM can be easily grasped, and by checking the range of the light-emitting elements that are lit, the ratio of the adjusted BPM to the original BPM can be grasped.
In addition, since the base point can be fixed, for example, when the base point is set at the top of the dial, the process of calculating the position of the base point on the rotating dial can be omitted.

1...acoustic control device, 2...housing, 341, 344...dial, 342...display unit, 342A...first display unit, 342B...second display unit, 346...light-emitting element, 52...first adjustment unit (adjustment unit), 55...second adjustment unit (adjustment unit), 58...display control unit, FG1, FG2, FG3...graphics, FG33...slide operator.

Claims (13)

An audio control device capable of adjusting the playback speed of music,
a display control unit that displays a graphic according to a comparison result between an original BPM, which is a BPM specific to the music piece, and an adjusted BPM, which is a BPM of the music piece after the playback speed has been adjusted ;
The acoustic control device according to claim 1, wherein the display control unit does not display the graphic when the original BPM and the adjusted BPM are the same . An audio control device capable of adjusting the playback speed of music,
a dial rotatable about a rotation axis;
an adjustment unit that adjusts the playback speed of the music piece based on a rotation operation of the dial;
a plurality of light-emitting elements provided along the rotation direction of the dial;
a display control unit that displays a graphic according to a comparison result between an original BPM, which is a BPM specific to the music piece, and an adjusted BPM, which is a BPM of the music piece after the playback speed has been adjusted ;
The display control unit controls the lighting state of each of the plurality of light-emitting elements to cause the plurality of light-emitting elements to display the ratio of the adjusted BPM to the original BPM . 3. The acoustic control device according to claim 2 ,
The display control unit
If the ratio is greater than 100%, among the plurality of light-emitting elements arranged clockwise from a base point provided in the circumferential direction of the dial, a number of light-emitting elements corresponding to the ratio are turned on;
When the ratio is less than 100%, an acoustic control device lights up a number of light-emitting elements corresponding to the ratio among the plurality of light-emitting elements arranged counterclockwise from the base point. 4. The acoustic control device according to claim 2 , wherein:
The sound control device is characterized in that the plurality of light-emitting elements are provided on the dial. 4. The acoustic control device according to claim 2 , wherein:
a housing in which the dial is provided,
The sound control device is characterized in that the plurality of light-emitting elements are provided around the dial on the housing. 6. The acoustic control device according to claim 1,
10. An acoustic control device, wherein the graphic represents a magnitude relationship between the original BPM and the adjusted BPM. 7. The acoustic control device according to claim 1,
The display control unit changes at least one of the brightness, color, and blinking cycle of the graphic in accordance with the ratio of the adjusted BPM to the original BPM. The acoustic control device according to any one of claims 1 to 7 ,
An acoustic control device characterized in that the brightness of the graphic increases as the difference between the original BPM and the adjusted BPM increases. The acoustic control device according to any one of claims 1 to 7 ,
An acoustic control device, characterized in that the luminance of the graphic decreases as the difference between the original BPM and the adjusted BPM increases. An audio control device capable of adjusting the playback speed of music,
a display control unit that displays a graphic according to a comparison result between an original BPM, which is a BPM specific to the music piece, and an adjusted BPM, which is a BPM of the music piece after the playback speed has been adjusted ;
The acoustic control device is characterized in that the graphic is a slider having a slide operator disposed at a position according to the ratio of the adjusted BPM to the original BPM within a predetermined slide range . The acoustic control device according to claim 10 ,
An acoustic control device, wherein the range of the ratio of the adjusted BPM to the original BPM indicated by the slide range varies depending on the ratio of the adjusted BPM to the original BPM. The acoustic control device according to any one of claims 1 to 11 ,
An acoustic control device comprising a display unit that is controlled by the display control unit and displays the graphic. An audio control device capable of adjusting the playback speed of music,
a dial rotatable about a rotation axis;
an adjustment unit that adjusts the playback speed of the music piece based on a rotation operation of the dial;
a plurality of light-emitting elements provided along the rotation direction of the dial;
an audio control device comprising: a display control unit that controls the lighting state of each of the plurality of light-emitting elements to cause the plurality of light-emitting elements to display the ratio of the adjusted BPM, which is the BPM of the song after the playback speed has been adjusted, to the original BPM, which is the BPM unique to the song.