JPS6032877B2 - foot key circuit - Google Patents

Description

[Detailed description of the invention] The present invention relates to a foot key circuit for an electronic musical instrument.

Conventionally, in electronic musical instruments, when a chord, for example a C chord consisting of C, E, and G, is pressed on the manual keyboard,
It is common to play by pressing the C foot key, but in order to change the performance, there is a sophisticated so-called alternate performance in which the C foot key and, for example, the G foot key, which is a fifth higher than the C foot key, are pressed alternately. However, since this performance is performed using the feet, it is extremely difficult, especially for first-time D players.

SUMMARY OF THE INVENTION An object of the present invention is to provide a foot key circuit for a Kameko musical instrument that allows even beginners to easily perform the above-mentioned alternate performance.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3 showing one embodiment of the present invention, 1
is the main body of the electronic musical instrument, 2 is the upper keyboard, 3 is the lower keyboard, 4 is the foot keyboard, and 5 is a manual bass signal selection bar with a length of almost an octave on the front side of the bass castle of the lower keyboard 3. .

6 is a sound source; 7, 8, and 9 are key switches for the upper key, lower key, and foot key operated by the upper keyboard 2, lower keyboard 3, and foot keyboard 4, respectively; key switch 7
, 8 are connected to the sound source 6.

The output side of the upper key switch 7 is commonly connected and then connected to a speaker 13 via a tone circuit 10, a preamplifier 11, and a main amplifier 12. The output side of the lower key switch 8 is commonly connected and then connected to the main amplifier 12 via a tone circuit 14 and a preamplifier 15. Reference numeral 16 denotes a base signal output circuit, the input side of which is connected to the sound source 6, and the first and second output terminals 17 and 18 led out from the output side.

19 is a base signal selection switch driven by the base signal selection bar 5, both of its fixed terminals are connected to the first and second output terminals 17 and 18, respectively, and its movable terminals are connected to the preamplifier 20, the gate 21, It is connected to the main amplifier 12 via a tone circuit 22.

Further, one end of the key switch 9 is grounded, and the end of the key switch 9 is connected to the base signal output circuit 16. 23 is a rhythm signal generation circuit that supplies the rhythm pattern signal to the gate 21 as a gate signal.

In the above-mentioned slow growth, the operation will be explained next.

Note that the movable terminal of the base signal selection switch 19 is switched to the second output terminal 18 only when the base signal selection bar 5 is operated.
and is normally connected to the first output terminal 17. When the keyswitches 7 and 8 for the upper and lower keys are closed in response to the operation of both the upper and lower keyboards 2 and 3, musical instrument signals corresponding to the closed keyswitches 7 and 8 are transmitted from the sound source 6, respectively. Subika 13 via tone circuits 10, 14, etc.
will be issued.

In addition, when the foot keyboard 4 is operated, the key switch 9 for the foot keys is activated.
When the foot key is closed, a first base signal corresponding to the key name of the operated foot key is sent to the first output terminal 17, and a second base signal that is 5 degrees higher than that base signal is sent to the second output terminal 17. Terminal 1
Of the two base signals, only the base signal selected by the base signal selection switch 19 is automatically switched on and off by the rhythm pattern signal from the rhythm signal generation circuit 23 at the gate 21 and transmitted to the speaker 13. is supplied to Therefore, if the performer continues to press a specific foot key on the pedal keyboard 4, a bass signal corresponding to that key name will be output, and if the player operates the bass signal selection bar 5 in that state, the bass signal will be 5 degrees higher than the base signal. Since a high bass signal is output, when playing alternately, it is only necessary to rotate the bass signal selection bar 5 with the left hand every other measure. Moreover, since this bass signal selection bar 5 is placed in front of the bass range of the lower keyboard 3, it is also possible to operate the bass signal selection bar 5 with the palm of the hand while operating the lower keyboard 3 with the fingers of the left hand. It is. In this embodiment, the second base signal is a signal that is 5 degrees higher than the first base signal, but even if the signal is 3 degrees higher, or 2 degrees, 4 degrees, or 6 degrees lower, the lower keyboard 3 In coordination with the chord performance, the effects of the present invention can be fully obtained.

Next, another embodiment of the present invention will be described with reference to FIG.

In the drawings, the same parts as in FIG. 3 are given the same reference numerals. In this embodiment, the first and second output terminals 17 and 18 of the base signal output circuit 16 are connected to separate gates 21a and 21b, respectively.
After passing through each, it is supplied to the common preamplifier 20,
Further, the rhythm signal generation circuit 23 has two output terminals,
One of them is directly connected to the gate 21a, the other is connected to the movable terminal of the base signal selection switch 19, one fixed terminal of the switch 19 is connected to the gate 21a, and the other fixed terminal is connected to the gate 21b. This embodiment is different from the previous embodiment in that the present embodiment is different from the previous embodiment.

To explain the operation of this embodiment, first, when the base signal selection switch 19 is not operating the base signal selection bar 5, its movable terminal is connected to the gate 21b.

In this state, if the performance idea continues to press a specific foot key in the foot keyboard 4, the base signal corresponding to that key name and the base signal 5 degrees higher than that key name will be transmitted to the first and second base signals as described above. Nine gate signals are supplied to the output terminals 17 and 18 of the votive table, and nine gate signals are supplied from the rhythm signal generation circuit 23 to the gates 21a and 21b alternately according to the rhythm. Each of the bass signals supplied with a voltage passes alternately through the gates 21a and 21b and is supplied with a voltage to the speaker 13, so that a so-called alternate performance is automatically performed. If you do not wish to perform this automatic alternate performance, operate the base signal selection bar 5 to connect the movable terminal of the base signal selection switch 19 to the gate 21a, and only the first base signal will be supplied to the speaker 13. The second base signal cannot pass through gate 21b. In this embodiment, the bass signal selection bar 5 is operated only when no alternate performance is to be performed, so it is advantageous when playing a song that incorporates many alternate performances.

As described above, the present invention allows even beginners to perform alternate performances as appropriate with extremely simple operations. Since it is configured to be operated by a bass signal selection bar 5 arranged to have a length of approximately -octave on the front side of the bass range of the keyboard 3,
For example, while operating the low-range manual keyboard 3 with the fingers of your left hand to perform accompaniment, you can use the palm of your hand to operate the bass signal selection bar 5.
This has an excellent effect in that it is possible to simultaneously operate the manual keyboard 3 and to perform alternate performances as necessary without interrupting the performance on the manual keyboard 3 in any way.

[Brief explanation of the drawing]

FIG. 1 is a front view of an electronic musical instrument for explaining one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a block circuit diagram thereof, and FIG. 4 is a diagram showing another embodiment of the present invention. FIG. 2 is a block circuit diagram for explanation. In the figure, 4 is a foot keyboard, 5 is a base signal selection bar, 9 is a foot key switch, 16 is a base signal output circuit, and 19 is a base signal selection switch. Figure 1 Figure 2 Figure 4 Figure 3

Claims (1)

[Claims] 1. A foot keyboard 4 consisting of foot keys for at least one octave.
and a first base signal corresponding to the key name of the operated foot key, which is driven by each of those foot keys, and a second base signal whose pitch is a predetermined number of degrees apart from the base signal. key switch circuits 9 and 16 for output; a gate 21 to which a rhythm pattern signal is supplied as a gate signal and repeatedly switches on and off the first and second base signals;
a base signal selection switch 19 that controls transmission of the first and second base signals, and further includes a base signal selection bar 5 that operates the base signal selection switch 19.
are arranged so as to have a length of approximately one octave on the front side of the bass range of the manual keyboard 3. 2. The second base signal is 3 degrees, 5 degrees, or 7 degrees higher than the first base signal, or 2 degrees, 4 degrees, or 6 degrees lower than the first base signal. The foot key circuit described in Section 1. 3. The base signal selection switch 19 outputs the first base signal when the base signal selection bar 5 is not operated, and outputs the second base signal when the base signal selection bar 5 is operated. The first or second range of
The foot key circuit described in section. 4. The base signal selection switch 19 outputs the first and second base signals when the base signal selection bar 5 is not operated, and outputs only the first base signal when the base signal selection bar 5 is operated. Claim No. 1
The foot key circuit according to item 1 or 2.