JP2520045B2 - Transpose device - Google Patents

Description

The present invention relates to a transpose device used for an electronic musical instrument such as a synthesizer, an electronic piano, an electronic organ, and the like. It relates to a transpose device that can be performed.

(Prior Art) In recent years, electronic musical instruments have come into widespread use, and those having a transpose function have been developed.

This transpose function changes the basic tone written in the score to transpose the complicated music that is expressed by using a large number of black keys so that it can be played using only a white key. Is.

As a device for designating such a transpose change, a device as shown in FIG. 3 is conventionally known.

FIG. 1A shows an apparatus for changing the transpose configured by using a slide type switch provided on an operation panel (not shown). That is, this apparatus is composed of a knob 31 that is slidable in the direction of the arrow in the figure, and symbols (F # to F) 32 that are stamped above the knob 31 and indicate the type of basic tone. A positioning mark 33 is engraved on the knob 31.

When changing the transpose, the performer
By grasping 31 and sliding it in the direction of the arrow shown in the drawing, and aligning the marking 33 of the knob with the symbol 32 indicating the kind of the basic tone,
Within the range of one octave, the basic tone can be raised or lowered in semitone steps from F # to F.

FIG. 1B shows an apparatus for changing the transpose, which is configured by using a rotary (rotary) switch provided on an operation panel (not shown). That is, this apparatus is composed of a knob 41 that is rotatable in the direction of the arrow in the figure, and symbols (F # to F) 42 that are stamped around the knob 41 and indicate the type of basic tone. A positioning mark 43 is engraved on the knob 41.

When changing the transpose, the performer
Grab 41 and rotate in the direction of the arrow shown to engrave the knob 41.
By matching 43 with the symbol 42 indicating the kind of keynote, in the same range as described above, within the range of one octave, from F # to F
It is possible to raise or lower the tone in steps of up to one semitone.

However, in the case where the transpose is changed by using the slide type switch or the rotary type switch as described above, the mark 33 (or 43) on the knob 31 (or 41) and the symbol 32 indicating the engraved basic tone are used depending on the viewing angle. (Or 42), there is a drawback that it is easy to misidentify the current basic tone position.

Also, since the slide type switch and the rotary type switch both change the basic position in stages,
There was a shortcoming that it could not be directly adjusted to the desired tone.

Further, although there is a relationship with the viewing angle described above, in the process of gradually changing the basic tone position, there may be a case where the basic tone is erroneously adjusted to an adjacent basic tone, resulting in poor operability.

(Problem to be Solved by the Invention) As described above, according to the present invention, the transpose change is performed by using the slide type switch or the rotary type switch as described above. There is a gap between the two, and it is easy to misidentify the current keynote position. Since the keynote position is changed step by step, it is not possible to immediately adjust to the desired keynote, and stepwise This is done in order to eliminate the disadvantage of poor operability in the case of accidentally adjusting to the adjacent tone in the process of changing the tone position. It is an object of the present invention to provide a transpose device which can be easily recognized and can be quickly and accurately adjusted to a desired basic tone position and which is excellent in operability.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, a transpose device of the present invention corresponds to a mode transition means for instructing transition to a transpose mode and a basic tone for transition. And a plurality of switch means arranged in order of note names, and when the transpose mode is instructed by the mode transition means, by pressing the switch means, the transposition to the keynote corresponding to the pressed switch is performed. When a transpose mode is instructed by the mode transition means and two adjacent switch means are pressed, an intermediate sound between the corresponding pitch names of the two switches is executed. Characterized by performing a transpose to the keynote of the name.

(Operation) In the present invention, when performing the transpose, one of a plurality of switch means arranged in the order of pitch name corresponding to the keynote to be shifted, in a state where the mode shift means instructs to enter the transpose mode, or The two keys are combined and pressed, whereby one keynote is selected, and the pressed switch means is displayed to indicate which keynote is currently selected. As a result, the present basic tone position can be easily recognized regardless of the viewing angle, and the desired basic tone position can be quickly and accurately adjusted.

(Embodiment) FIG. 2 is a schematic block diagram showing an overall configuration of an electronic musical instrument to which the transpose device according to the present invention is applied.

In the figure, 11 is a keyboard switch group, which includes a keyboard and a key scan circuit for detecting the pressed state of each key.

A panel switch group 12 includes various switches such as a power switch, a mode designation switch, a tone color selection switch, and a volume control switch, as well as a mode transition switch 1 for transitioning to a transpose mode directly related to the features of the present invention. Selection switches 2a to 8a for selecting the basic tone of
And display devices 2b to 8b. Details of these will be described later. In addition, the set state of each switch is detected by the panel scan circuit included therein at the same time as the keyboard switch group 11.

Reference numeral 13 denotes a switch interface, which checks the states of the keyboard switch group 11 and the panel switch group 12 and turns on (O
N) It outputs the panel switch data in the state, the keyboard code and touch newly turned on, and the keyboard code newly turned off. The touch information is generated by a well-known touch detection circuit (not shown).

A central processing unit (CPU) 14 controls each part of the electronic musical instrument according to a program stored in a program memory part of the memory 15.

The memory 15 is composed of ROM and RAM,
The ROM includes a program for operating the CPU 14, tone color data, and various other fixed data. Also, RA
M is used as an area for memorizing the system state and working.

Reference numeral 17 is a tone generator circuit, which generates a tone signal in response to an instruction from the CPU 14. A waveform memory 18 is connected to the tone generator circuit 17.

The switch interface 13, the CPU 14, the memory 15, and the tone generator circuit 17 are connected to each other via a system bus 21.

The digital tone signal output from the tone generator circuit 17 is sent to the D / A converter 19.

Reference numeral 19 denotes a D / A converter, which converts an input digital musical tone signal into an analog musical tone signal. The analog tone signal converted by the D / A converter 19 is supplied to the acoustic circuit 20.

Reference numeral 20 denotes an acoustic circuit, which converts an inputted analog musical tone signal as an electric signal into an acoustic signal. The acoustic circuit 20 emits sound by a sound generating unit represented by, for example, a speaker or headphones.

FIG. 1 shows only a portion of the panel switch group 12 of the operation panel (not shown) relating to transpose change.

In the figure, reference numeral 1 is, for example, a push button type mode shift switch, which is used to enter the transpose mode. That is, the transpose mode is maintained while the mode transition switch 1 is pressed.

2a to 8a are, for example, push button type selection switches. The selection switches 2a to 8a are provided only for the keynote components (C, D, E, F, G, A, B) corresponding to the white keys on the keyboard.

Reference numerals 2b to 8b are display devices composed of, for example, LEDs. The indicators 2b to 8b are provided corresponding to the selection switches 2a to 8a, and when any of the selection switches 2a to 8a is pressed in the transpose mode, the selected selection switch 2a to 8a is pressed. The indicators 2b to 8b corresponding to 8a are turned on.

Reference numeral 9 is a stamp indicating a basic tone, and is a semitone step and is C, C #, D, D #,
Twelve types, E, F, F #, G, G #, A, A #, and B, are engraved.

Next, in the above configuration, the transpose changing process will be mainly described.

First, when the player changes the transpose, he or she depresses any one of the selection switches 2a to 8a while depressing the mode transition switch 1 on the operation panel. In this case, when the tone corresponding to the white key is to be adjusted, one selection switch is pressed, and when the tone corresponding to the black key is to be adjusted, two switches corresponding to the white keys that are adjacent to both sides thereof are simultaneously pressed.

For example, when adjusting the tone to F, select switch 5a
When the button is pressed, the selection switches 5a and 6a are pressed at the same time to match with F #.

Further, among the selection switches 2a to 8a, the indicator (any of 2b to 8b) corresponding to the pressed selection switch is lit. In this lighting state, when the mode transition switch 1 is released,
Turn off the light.

Next, the pressed state of the selection switches 2a to 8a, that is, the keynote data is taken in by the CPU 14 via the switch interface 13. Then, the CPU 14 stores the acquired basic tone data in the RAM area of the memory 15.

After that, the CPU 14 refers to the basic tone data stored in the RAM and performs the tone generation processing while performing the transpose processing.

That is, the tone generation process is performed as follows. First, CPU14
Sends to the tone generator circuit 17 information necessary for sounding, that is, key on / off, key number, envelope, velocity, tone number and the like.

At this time, the CPU 14 calculates the frequency to be transposed by referring to the basic tone data previously stored in the memory 15, increases or decreases the key number by the calculated value, and outputs the increased or decreased key number to the tone generator circuit 17 Tell.

The tone generator circuit 17 converts the increased / decreased key number into a frequency number to determine the reading speed from the waveform memory 18. On the other hand, the tone generator circuit 17 determines the read position of the waveform memory 18 based on the given tone number. Then, the contents of the waveform memory 18 are read from the determined read position at a speed according to the frequency number.

As a result, a musical tone signal having a transposed pitch is generated, and a digital musical tone signal is generated by adding envelope and velocity thereto. Then, this digital musical tone signal is converted into an analog musical tone signal by the D / A converter 19 and is emitted by the acoustic circuit 20.

In the above embodiment, the selection switches 2a to 8a are configured to be used only for the selection of the basic tone.However, another mode selection switch is provided, and the display devices 2b to 8b selectively select the contents other than the basic tone. It may be configured to display. In this case, the number of display devices can be reduced by the configuration required for the contents and the selection method, and the device can be constructed at a lower cost.

[Effects of the Invention] As described in detail above, according to the present invention, the present basic tone position can be easily recognized regardless of the viewing angle, and the operability is excellent in that the desired basic tone position can be quickly and accurately adjusted. It is possible to provide a transpose device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a block diagram schematically showing an overall configuration of an electronic musical instrument to which the present invention is applied, and FIG. 3 is a conventional transpose device. It is a block diagram for doing. 1 ... Mode transition switch (mode transition means), 2a to 8a
...... Selection switch (switch means), 2b to 8b …… Display unit (display means).

Claims (1)

(57) [Claims] 1. A transposing mode comprising: a mode shifting means for instructing shifting to a transpose mode; and a plurality of switch means arranged in order of pitch name corresponding to a tone to be shifted. When the switch mode is instructed, the switch means is pressed to perform transposition to a keynote corresponding to the pressed switch. A transpose device, wherein when two matching switch means are pressed, transposition to a keynote of an intermediate pitch name of corresponding pitch names of the two switches is performed.