JPS59127095A - Electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic musical instrument in which musical tone control information is automatically set when power is turned on.

As is well known, in electronic musical instruments, in order to set musical tone control information, that is, parameter information regarding pitch, timbre, volume, effects such as vibrato, tempo, etc.
A large number of controls are provided on the panel surface. by the way,
For example, in electronic musical instruments that use self-resetting switches as these controls, when the power is turned off, the setting state of each control is automatically canceled, and therefore each control is reset every time the power is turned on. must be newly set. Particularly with electronic musical instruments, panel operations are performed frequently and intuitively depending on the performance atmosphere, performance status, etc. Therefore, once the setting state of each control is released, based on this, It's not easy to go back.

Therefore, the musical tone control information set by each controller is periodically stored in non-volatile RAM (random access memory).
Alternatively, it is conceivable to write the data into a battery-backed RAM, read the data in this RAM when the power is turned on, and automatically set each operator based on the read data. However, with this method, if the power is turned off while musical tone control information is being written to the RAM, only incomplete data will be stored in the RAM.
There may be cases where the initial purpose cannot be achieved because the data cannot be written to. Particularly in electronic musical instruments having multi-stage keyboards, there are a large number of operators, and therefore it takes time to write data to the RAM.As a result, the above-mentioned situation is likely to occur.

In view of the above-mentioned circumstances, this invention has been developed to provide, when the power is turned on,
To provide an electronic musical instrument that is capable of automatically resetting the musical tone control information that was set when the power was last turned off without making any errors. Repeatedly writing to each storage area at a predetermined timing, and each time each writing is completed, a completion mark is written to the storage means, and when the power is turned on again, the last completely written musical tone control information is read from the storage means. It is designed to allow you to set the musical tone.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an electronic musical instrument according to the present invention. In this figure.

Code 1 is the CPU (Central Processing Unit), pass line 2
It is connected to each part of the device via. 3 is a ROM (read-on memory) in which programs used by the CPU 1 are stored; 4 is a RAM (random access memory) for temporary data storage; 5 is a RAM in which musical tone control data GD, etc. are stored; A battery backup circuit 6 provides battery backup. As shown in Figure 1, this RAM 5 is configured with preset data areas E1 to EN, a panel data area EB + Eb, and a 7-bit lag area EF, and preset data E□ to EN. and musical tone control data G in panel data areas Ea and Eb.
D is written and the panel flag PF is written in the flag area EF.
LG is written. 7 is a panel switch group, and this panel switch group 7 includes musical tone control switches such as a tone selection switch, an effect setting switch, a rhythm setting switch, etc., as well as N preset switches and 7 preset data writing switches. Contains switch. 8 is a panel switch circuit which detects a musical tone control switch in the ON state of the panel switch group 7 and outputs musical tone control data GD corresponding to the musical tone control switch to the pass line 2;
Further, it detects a preset switch or a preset data write switch that is in an on state, and outputs switch data SWD corresponding to the switch to the pass line 2.

Further, this panel switch circuit 8 includes a panel switch group 7
The musical tone control switches are automatically set based on the musical tone control data GD supplied via the pass line 2, and the illumination lamps provided in each musical tone control switch are turned on based on the musical tone control data GD. Note that when a volume is used instead of the musical tone control switch, and the volume is configured to be automatically operated by all motors on its rotating shaft, the panel switch circuit 8 may be configured to perform automatic operation based on the supplied musical tone control data GD. The motor may be configured to be automatically driven.

Next, 9 is a keyboard, and each key of this keyboard 9 is provided with a key switch for detecting key operation. Reference numeral 10 is a key press detection circuit, which scans the output of each key switch of the keyboard 9 at a constant cycle to turn on/off each key switch.
Key code K of the key that detects the off state and is in the on state
Output c to pass line 2. A musical tone signal forming section 11 forms musical tone signals based on the musical tone control data GD and key code KC supplied via the pass line 2, and outputs the musical tone signals to the sound system 12. In this case, the pitch of the musical tone signal to be formed is determined by the key code KC, and musical tone aspects such as timbre, volume, effect, etc. are determined by the musical tone control data GD. The sound system 12 generates the supplied musical tone signal as a musical tone. Therefore, DC power is supplied to each of the above-mentioned parts from the power supply circuit 13,
Further, the power is turned on/off by a power switch 14. Furthermore, power is supplied to the RAM 5 from the power supply circuit 13 when the power switch 14 is on, and power is supplied from the battery back amplifier circuit 6 when the power switch 14 is off.

Next, the operation of the above embodiment will be explained with reference to the flowcharts shown in FIGS. 3 and 9.

FIG. 3 is a flowchart showing the main routine of processing in the CPUI, and FIG. 9 is a flowchart showing details of the panel data writing subroutine SH in the main routine.

First, when the power switch 14 is turned on, processing in the CPU proceeds to step S1 shown in FIG.
It is determined whether the panel flag PFLG in 5 is 1 or not. If the result of this judgment is rYEsJ, the process proceeds to step S2, and if the result is rNOJ, the process proceeds to step S3.
Proceed to. In step S2, the musical tone control data GD in the panel data area Ea of the RAM 5 is read out and supplied to the panel switch circuit 8. As a result, the musical tone control switch of the panel switch group 7 is automatically set in accordance with the musical tone control data GD in the panel data area Ea, and the illumination lamp of the selected switch is lit.

Further, in step S3, the musical tone control data GD in the panel data area Eb of the RAM 5 is read out and supplied to the panel switch circuit 8. As a result, the musical tone control switch of the panel switch group 7 is automatically turned on in accordance with the musical tone control data GD in the panel data area Eb, and the illumination lamp is turned on. Next, proceeding to step S4, panel data area E8-1. The musical tone control data GD read from the musical tone signal forming section 11 or Eb is transferred to the musical tone signal forming section 11 and set in an internal register. Then, the process advances to the panel data writing subroutine SB.

In this panel data writing subroutine SB,
First, in step 5BI (Fig. 9), panel 7 lug P
It is determined whether FLG is 0 or not. If the judgment result is rYEsJ, the process proceeds to step SB2, where the musical tone control data, riGD, output from the panel switch circuit 8,
That is, musical tone control data GD corresponding to the output of the musical tone control switch currently in the ON state is written to the channel data area E& of the RAM 5. Next, when this writing is completed, the process advances to step SB3, and the (nel flag P
1 is written to area EF of RAM 5 as FLG.

On the other hand, if the determination result in step SBI is rNOJ, the process advances to step SB4, where the musical tone control data GD output from the panel switch circuit 8 is written into the panel data area Eb of the RAM 5. Next, when this writing is completed, the process advances to step SB5, and the panel flag PF is set.
Area EFguO'' of RAM5 is written as LG.

Then, the process advances to step S5 of the main routine.

In step S5, it is determined whether the preset switch or the preset data write switch of the panel switch group 7 is turned on. And this judgment result is rY
In the case of EsJ, the process advances to preset processing routine S6.

In this preset processing routine S6, the following processing is performed. That is, for example, if only the first preset switch is operated, the "music tone control data G" set in the digital data area E of RAM5 is
D is read out and supplied to the panel switch circuit 8 and musical tone signal forming section 11. As a result, the tone control switch is automatically set, the illumination lamp of the set switch is turned on, and the tone control data GD in area E□ is set in the register in the tone signal forming section 11. Thereafter, the musical tone aspect (timbre, etc.) of the musical tone signal formed by the musical tone signal forming section 11 corresponds to the musical tone control data GD in the area El. Similarly, for example, the Nth
Only the th preset switch is operated, and in this case, the musical tone control data CD in the preset data area EN is transferred to the panel switch circuit 8 and the musical tone signal forming section 11. Further, when both the first preset switch and the preset data write switch are operated, the musical tone control data GD output from the panel switch circuit 8 is written into the preset data area E□ of the RAM 5. Similarly, if the Nth preset switch and preset data write switch are both operated,
Musical tone control data G output from panel switch circuit 8
D is written into the preset data area EN of the RAM 5. Then, the process advances to step S7. On the other hand, step s
If the result of the judgment in step 5 is "NO", the above-mentioned preset processing routine S6 is jumped to and step s7 is performed.
Proceed to.

In step S7, it is determined whether or not there has been a change in the set state of the musical tone control switch in the panel switch group 7 (whether or not the performer has moved the musical tone control switch). If the result of this determination is rYESJ, the process advances to step S8. In step s8, the musical tone control data GD output from the panel switch circuit 8 is transferred to the musical tone signal forming section 11 and set in an internal register. Then, the process advances to step s9. Also, the determination result in step S7 is rN
In the case of Oj, jump to step S8 and proceed to step S.
Proceed to 9. In step s9, the key code KC output from the key press detection circuit 10 is transferred to the tone signal forming section 11. Then, the process returns to the panel data writing subroutine SB. Thereafter, the above-described subroutine SB and steps 85 to s9 are repeatedly executed.

As is clear from the above explanation, in the embodiment shown in FIG. 7, every time the panel data writing subroutine SB is executed at a predetermined timing, the ON/OFF state of the musical tone control switch at that time corresponds to the ON/OFF state of the musical tone control switch. The musical tone control data GD to be performed are alternately written into the panel data areas E8 and Eb of the RAM 5 (step SB shown in FIG. 9).
2 and SB4). Furthermore, when the writing in area E& is completely completed, panel flag PFLG1 is written in flag area E (step 5B3), and
When the writing of b is completely completed, the panel flag PFL
GO is written to flag area E (step 5B5
). Here, the panel flag PFLG is for each area E&+
This indicates that the writing of Eb has been completely completed, and also indicates the area where musical tone control data CD should be written next. That is, subroutine SB is executed at a certain time, and as a result, musical tone control data GD is written in area E4,
Furthermore, when the flag area EFl'c'l'' is written, when the primary subroutine SB is executed, step S
The determination result of BI is rNOj, and therefore musical tone control data GD is written in area Eb, and '0' is written in flag area E.

Furthermore, when the next subroutine SB is executed, the determination result in step SBI becomes rYEll, and therefore, the musical tone control data CD is written into the area Ea again.

On the other hand, for example, if the power is turned off during writing to area Ea, the data in area Ea will be incomplete, but the previously completely written musical tone control data GD will be in area E4. The panel flag PFLG is set to 0 indicating area Eb. Therefore, by checking the panel 7 lag PFLG, it can be determined in which area Ea or Eb the musical tone control data GD that was completely written last before the power was turned off is located. Step S1 in FIG.
is what makes this judgment.

In the above embodiment, the panel data areas Ea and Eb are written in the main routine shown in FIG. 3 (subroutine SB), but the following may be done instead.

■ Periodically interrupt the CPUI using a timer, etc.
In this interrupt processing routine, the panel data area E
Write a and Eb.

■ Area Eal E only when a change in the operating state of the musical tone control switch is detected in step 87 (Fig. 3)
Write b.

In addition, in the embodiment described above, the panel date fix
Although two IJ areas Ea and Eb are provided, three or more such areas may be provided and musical tone control data may be sequentially and repeatedly written in each area. Alternatively, instead of all musical tone control switches, only musical tone control data corresponding to important switches such as a tone color selection switch may be written in the panel data area.

As explained above, according to the present invention, a nonvolatile storage means having a plurality of storage areas is provided, and musical tone control information is sequentially and repeatedly written to each storage area at a predetermined timing; A completion mark is written to the storage means, and when the power is turned on again, the last completely written musical tone control information is read out from the storage means and musical tone settings are made. This provides an advantage in that the previously set musical tone control information can be automatically reset without error.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
Fig. 1 is a diagram showing the storage area of the RAM 5 in the same embodiment, Fig. 3 is a flowchart showing the main routine of CPU processing in the same embodiment, and Fig. 9 shows details of the panel data writing subroutine SB in the same flowchart. The flowchart is l...CPU (Central Processing Unit)-5...
・RAM (Random Access Memory)-6...
Battery back amplifier circuit, 7... Panel switch group, 11... Musical tone signal forming section. Applicant: Nichifu Musical Instruments Manufacturing Co., Ltd. Figure 1 Figure 3

Claims (1)

[Claims] In an electronic musical instrument having a musical tone control information setting means for setting musical tone control information and a musical tone forming means for forming a musical tone based on the musical tone control information set by the musical tone control information setting means, there is provided a non-volatile electronic musical instrument having a plurality of storage areas. and a control means for controlling writing and reading of the storage means, the control means sequentially and repeatedly writing the musical tone control information into each storage area of the storage means at a predetermined timing, and A write completion mark is written to the storage means each time each write is completely completed, and when the power is turned on, all musical tone control information that was completely written to the storage means before that time is written to the completion mark. An electronic musical instrument characterized in that the musical tone control information is detected based on the musical tone, the musical tone control information is read from the storage means, and the read musical tone control information is supplied to the musical tone forming means.