JPS6015694A - 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 [Technical Field of the Invention] The present invention relates to an electronic musical instrument capable of generating sustained musical tones.

[Prior art]

In conventional electronic musical instruments that can generate sustained musical tones, when the sustain pedal or sustain switch is turned on, sustain is applied to all musical tones on the nameplate while the sustain pedal or sustain switch is turned on. .

[Conventional problems]

As mentioned above, if sustain is applied to all musical notes of the operation key while the sustain pedal etc. is on, the sustain will overlap one after another when connected, and the sustain will be applied to only some notes. There was a problem that it was not possible to apply .

[Purpose of the invention]

[Summary of the Invention] The present invention provides a means for preventing sustain from being applied to the musical tone that is pressed against the operation key after the sustain switch means is turned on. be.

Further, when the sustain switch means is turned on while a key is already being pressed, the musical tone of that key continues to be sustained even if the key is released, at least until the sustain switch means is turned off. The point is that we have further established the following.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall purchase diagram of the electronic musical instrument of this embodiment. That is, the keyboard 1 is provided with a plurality of keys, and the output signal from each key is sent to the special sustain switch (
88-8W) Means 2 for determining the ON operation of 5, above 55
-5W is inputted to the means 3 for determining whether a key has been pressed after being turned on and the key information output means 4. Special sustain switch (
8B-8W) 5 is a conventionally known normal sustain switch, that is, when the sustain switch is turned on, the sustain switch has the function of applying sustain to all musical notes of all operation keys. This is a sustain switch that has a different function, which is the key point of this invention. The output of 88-8W5 is input to the above-mentioned determining means 2.3 and also to means 6 for determining whether 8B-8W5 is off.

The discrimination signal of the discrimination means 20 is the sustain information output means 7.
is applied to drive it and output a sustain signal. This sustain information is gated in accordance with the discrimination signal from the discrimination means 6, is added to the key information outputted by the key information output means, and is input to the tone generator 9 to create the musical tone signal. The musical tone is emitted through the speaker 11. In this case, until 8s8W5 is turned off, the musical tone will continue to be emitted with sustain even if the key to which sustain has been applied is released.

The discrimination signal from the discrimination means 3 is applied to the key information output means 8 to drive it, output the S information, and send it to the tone generator 9. As a result, the sustain information is not added to the musical sound when the key is pressed after Bs-5w5 is turned on, that is, the musical sound is emitted as a musical sound to which no sustain is applied.

FIG. 2 shows a specific block circuit diagram with respect to FIG. 1. In the figure, 12 is a microcomputer. This microcomputer 12 has an 0PU (central processing unit) 13,
Memory 14, l10 (input/output) interface 1
It consists of 5. The memory 14 stores programs that control all operations of this electronic musical instrument.
The PUI 3 receives a scan signal for the keyboard 1 according to the control program in the memory 14, and receives a 1! from the keyboard 1! I
IIf information is input via the interface 15 of the machine 10. Furthermore, when the output signal of 55-5w5 is input to the 0PU13 via the I10 interface 15 (!PU13 processes this output signal according to the above control program, the CPU 13 processes the input key information and 8B-
When the output of the 8W5 is processed, a necessary musical tone generation signal is generated, which is applied to the tone generator 9 via the 110 interface 15, and the musical tone is emitted from the speaker 11.

This electronic musical instrument has, for example, an 8-channel musical tone generation system and is capable of simultaneously generating up to 98 musical tones using a time-sharing processing method according to the above-mentioned control program.

Next, the operation will be explained with reference to the 70-chart of tg 3 m(4) and (8) and the time chart of FIG.

Now, as shown in the time chart of Fig. 4, the first key (Key 1) and the second key (Key 2) are activated at time T1.
) are turned on at the same time, two musical tones start to be generated at the same time, and at time T, while both keys are still being pressed, 88-8.
W5 is turned on. Next, the second key is released at time T3 while this 5s-8W5 is still on. Furthermore 8B-
At time T, while 8W5 is on, the third key (xey
a) is turned on and the generation of that musical tone is started. Next 5s-
At time T's while 8W5 is still on, only the third key is released, and the state returns to the state where only the first key is on.

Next, at time T6 when the key of Raku 1 is turned on, 88-
Let us take as an example the case where 8W5 is turned off and then the key of the first house is released at time NTt, resulting in a silent state.

First, when the first bowl and the second key are turned on at the same time at time T, the key information from the second @ keyboard 1 is input to the 0PUI 3 via the I/Q interface 15, and then (
7P[T13 processes the key information in a time-sharing manner according to the control program in the memory 14, and provides generation information for each tone to the tone generator 9 via the interface 15 of the tone generator 10. For this reason C! The first in the two musical tone generation channels assigned by PUI 3.
The musical tone signals of the key and the second key are generated respectively, and the amplifier 1
0, two musical tones are emitted simultaneously through the speaker 11. On the other hand, in FIG. 1, since 8B-8W5 has not been turned on yet, the discrimination signals of the discrimination means 2, 3 and 6 are invalid, and the key information output means 4 outputs T2 based on the output from the keyboard 1. The key information is input as is to the tone generator 9, and two musical tone signals are simultaneously generated as described above. Furthermore, the 31st
To explain the frettage yards of 1(A) and (g),
At time T1, first 88-8W5 of step S□
It is determined whether or not the state has changed from the off state to the on state. Although the answer is "NO", proceed to step S.
It is determined whether a new key has been turned on. Now, the first key and second key are turned on at the same time, so l'-YE
SJ, and the process proceeds to step s4, where channel allocation processing for eight musical tone generation channels begins.

That is, each musical tone generation channel is assigned a sound generation flag QT indicating whether or not the musical tone is being generated, which is assigned to the operating key, and a special sustain by 88-8W5. A special sustain flag Q8 is provided to indicate the content of +
t 01. When it is, it means that it is being reset, and when it is ti1t+, it means that it is being set.

Therefore, in step S4, the flags QT, Q
It can be determined whether or not there is a channel where both 8 and 8 are O", but since all 8 musical tone generation channels are empty channels, it becomes rYEsJ and proceeds to step S, where it is assigned to the first key. pronunciation flag Q of the channel
TC (now written as QT for distinction) and the pronunciation flag QT (now written as QT2) of the channel assigned to the second key.
) are both set to 1' to start generating each musical tone.

Next, the process proceeds to step S6, and it is determined whether or not there is a channel whose key has already been released, although the sound generation flag QT is set to 1''.Since the answer is currently ``NO'', the process proceeds to step 81G. This step S. Then, it is determined whether or not 88-8W5 has turned from on to off, and "N
O”, proceed to step SSt and play the key 1.88-8W.
A key scan for 5 etc. is executed, and the process returns to step S.

As described above, each tone of the first key and the second key starts to be generated simultaneously from time T1, but in the time chart of FIG. 4, the volume of the first key is changed to Tone 11 of the second key. The volume of the key is indicated as 'l'onθ2. Note that the third key plaster, which will be described later, is indicated as Tone 3. At this time T, the sound generation flag QT1 of the first key is "BI, special sustaining QsI is 0", and the flag QT2 of the second key is 11. II, flag Q8z is “0”
゛.

It is also illustrated in FIG.

Next, as described above, when 88-8W5 is turned on at time T when both the first key and the second key are pressed and their musical tones are emitted simultaneously, the output is determined. Means 2
The determination signal becomes valid, and the sustain information output means 7 is driven to output a suspension line information. At the same time, the output of 88-8W5 is also input to the discriminating means 6 to be discriminated, and the gate is opened and the sustain signal is displayed as shown in FIG.
! The information is added to the key information from the information output means 4 and begins to be input to the tone generator 9. That is, after 55-5w5 is turned on, sustain is applied to each tone of the first key and second key that were already on at that time.

This will be explained with reference to the flowcharts in FIGS. 3(a) and 3(g). When the process of step S1 is entered at time Tt, in this case, it is determined that 8B-8W5 has been turned on, and j
The result is YE8J, and the process proceeds to step h. Then, the channel whose sound generation flag QT is set to 1'1'' (LIN
Set the special sustain flag QS of E) to 1".Then, each sound generation flag Q of the first key and the second key is set to 1".
Since both T and QT are set to 111, the corresponding flags Qs1 and Qs2 are both set to H.

Next, it is determined whether or not a new key is pressed (step "'s").
), [ho J, so proceed to step S, and Yabari's answer is "NO", proceed to step 81 [+, and similarly, "N".
O' and the process proceeds to step 812, followed by step S.
Return to 1.

Next, when only the second key is released at time T3, step S
After the processing of + and Ss, in step S6, it is determined that the flag QT2 is l'IN for the second key and there is a channel in the key release state, and the process proceeds to step S. Then, the flag QT2 of the second key is set to 0°. Next, the process proceeds to step S6, and it is determined whether the flag Qs2 is 1", and since it is 1", the process returns to step S1 via step S+0s81□.

In other words, since the sound generation stop processing in step S9 is not performed, 8
Even after the second key, which was already being pressed when the B-8W5 was turned on, sustain is applied and the sound does not stop while the 55-5W5 is turned on, even after the key is released.
] The musical tone of the second key continues to be generated simultaneously with the musical tone of the first key.

Next, when the third key is turned on at time T, this is determined in step S3, and the process proceeds to step S4. Then, it is determined whether or not there is an empty channel where both flags QT and Qs are 0''. The flag QTs is set to ``1'', and generation of the musical tone is started (step S). And step Be 1S+. , 812 through step S
Return to 1.

Since this third key was pressed after the 88-8W5 was turned on, sustain cannot be applied to this musical tone.

That is, in FIG. 1, when the third key is turned on, the determining means 3 determines that the key has been pressed after the turning-on operation of 88-8W5, and drives the key information output means 8, so that the third key is turned on. The information is output and directly applied to the tone generator 9 without sustain information being added. Therefore, even if the third key is subsequently released at time TI+, the musical tone is not sustained and is immediately muted.

That is, when the third key is released at time T, step S,
, S, this is determined in step S, and the process proceeds to step S7. Then, the flag QT is reset to "0", and then the process proceeds to step s8, and the special sustain flag Qs of the third key remains at +i 0 II, and the third key is pressed after 88-8W50 is turned on. Since this indicates that the key has been locked, the answer is "NO" and the process advances to step S9.

The third key channel immediately enters the mute state from time T11 without being sustained. Then, step 8+osSu is executed and the process returns to step 81.

Next, when 88-8W5 is turned off at time T6, the determining means 6 in FIG. 1 determines this and closes the gate.
The sustain information is prohibited from being added to the key information from the key information output means 4. And Figure 3 (4)
,...), steps S1 and S
8. After each process of S6, 55-5w5 in step S1°
It is determined that the OFF operation is performed, and the process advances to step 811. Then, for the channels for which the 7-lag Q4s has been set to 1'', that is, for each channel of the first key and the second key, flags QT1 and QT2 are set to ``B'', and then the flag QS is set to ``B''. , ,QS, are reset to 0''. Then, via step 812, step S1
Return to And step S.

When the process advances to step S6 via step S6, it is determined that, excluding the first key which is still being pressed, only the second key that has already been released has its sound generation flag QT2 set to B, and that the key is currently being released. After the determination is made, the process proceeds to step S, where the flag QT2 is set to "0". Then, in step S, since the flag Qs2 is 11θ', it is determined "NO" and step S9
The second key channel is stopped, blocked, and cleared. Then, the process returns to step S via step 810S81□. Therefore, immediately after time T6 when 5S-SW5 was turned off, the second key's musical tone, which had been generated by sustaining it even though it had already been released, was muted, and from then on Only the musical tone of the first key being depressed is generated and emitted.

Next, when the first key is released at time T7, its state is determined in step S6 via steps S1 and S3, and the flag QT1 is set to "0" (step Bq). Then, in step S , it is determined that the flag Qs1 is not 11111, and step S
, and the first key immediately mutes the sound without sustaining it. Then, the process returns to step S1 via steps 81o to 8u, and is ready for the next key press operation.

〔Effect of the invention〕

As explained above, the present invention provides an electronic musical instrument in which sustain is not applied to the musical tones corresponding to the operating keys after the sustain switch means is turned on. This has the advantage that performance expression can be richer than before.

Further, the present invention prevents sustain from being applied to the musical sound of the operation key after the sustain switch means is turned on, and when the sustain switch means is turned on while the key is being depressed, the musical sound of that key is We have provided an electronic musical instrument in which sustain is applied to continue the sound even if the key is released, at least until the sustain switch means is turned off. It has the advantage of making you rich.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a specific configuration diagram of FIG. 1, FIG. This is a tights chart. 1...Keyboard, 2.3.6...Discrimination means, 4.8...Ant information means, 5...
...Special sustain switch, 7...Sustain information output means, 9...Tone generator, 11...Speaker, 12...Microcomputer, 13... ...CPU. 14-...Memory, 15...I10 interface 0 Patent applicant Casio Computer Co., Ltd. Agent Patent attorney Yama 1) Hako Hiko To τ1 Figure 1 Figure 2 Figure 3 (A) Figure 4T1T1T3TtTfTbT〒

Claims (2)

[Claims] (1) At least a keyboard, a sustain switch means,
In an electronic musical instrument having means capable of applying sustain to generate a musical tone, means for preventing sustain from being applied to the musical tone produced by the key when a key of the keyboard is pressed after the sustain switch means is turned on. An electronic musical instrument characterized by having. (2) In an electronic musical instrument having at least a keyboard, sustain switch means, and means capable of applying sustain to generate a musical tone, when the sustain switch means is turned on while a key of the keyboard is pressed, at least A means for sustaining the sustain even if the key is released until the sustain switch means is turned off, and a musical tone produced by the key when a key of the keyboard is pressed after the sustain switch means is turned on. An electronic musical instrument characterized by having a means for preventing sustain from being applied.