JP2760421B2 - Electronic musical instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an electronic musical instrument in which various functions (for example, various effects) can be switched on / off according to key touch information. About. 2. Description of the Related Art An electronic musical instrument whose effect is controlled on / off in accordance with the strength of key touch has been conventionally known. For example, Japanese Patent Publication No. 57-43914 discloses this kind of electronic musical instrument. A portamento device is described. [0003] In this type of conventional electronic musical instrument, the effect is turned on when the key touch strength exceeds a certain level, and turned off when the key touch strength falls below the same fixed level. Therefore, when the key touch intensity is near a certain level, the effect is turned on / off by the player's intention due to slight fluctuation of the key pressing force or vibration of the key return spring. On the contrary, there is a drawback that it is frequently performed. An object of the present invention is to eliminate the above-mentioned disadvantages. According to the present invention, there is provided a keyboard comprising a plurality of keys, and a key on / off in response to operation of the keyboard.
Depressed or released key information indicating, comprising an information generating means for generating a key touch information showing the pitch selection information and key touch indicating the pitch of a tone to be generated, the key depression and key release information, pitch selection information and An electronic musical instrument for generating a musical tone according to the operation of the keyboard based on key touch information and a musical tone by automatic accompaniment according to a predetermined accompaniment pattern, wherein the electronic musical instrument stores a function control signal, and is represented by the key touch information. When the key touch state to be performed is equal to or more than a predetermined first stage, the function control signal in the storage means is set to the second state, and the function control signal is in the second state and is represented by the key touch information. The second key touch state to be performed is smaller than the first step.
When the function control signal is at or above the second stage, the function control signal is held in the second state, and when the key touch state represented by the key touch information falls below the second stage, the function control signal is changed to the first state. And control means for setting the automatic accompaniment based on a function control signal in the storage means. FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. In this figure, reference numeral 1 denotes a keyboard, and 2 denotes a key press detection / key data generation circuit. The key press detection / key data generation circuit 2 detects the on / off state of each key of the keyboard 1, and when a key is newly pressed, the key code KC of the key and the key-on signal KON.
("1" signal), and when the key is turned off, the key-on signal KON is returned to "0". The key press detection / key data generation circuit 2 has an automatic accompaniment key data processing circuit 3, and the automatic accompaniment key data processing circuit 3 has an automatic accompaniment sound (automatic arpeggio sound, auto bass chord sound, etc.). ) Key code KC, key-on signal K
ON is generated and output to the tone generation circuit 4. When the tone generation circuit 4 has a plurality of tone generation channels, the key depression detection / key data generation circuit 2 assigns the key code KC relating to the pressed key and the automatic accompaniment tone to any one of the channels. Channel assignment is also performed.
Based on the key code KC and the key-on signal KON supplied from the key press detection / key data generation circuit 2, the tone generation circuit 4 forms a tone signal corresponding to a pressed key and an automatic accompaniment tone, and outputs the tone signal to the sound system 5. The sound system 5 amplifies the musical tone signal and produces a tone from a speaker. On the other hand, the key touch detection device 6 is a device that detects key touch states such as pressure, depth, displacement, and the like of a key press, and generates an output voltage TR corresponding to the magnitude thereof. The reference voltage generator 7 has four preset reference voltages SH.
1 to SH4. Here, when the relationship between the key touch strength and the voltage TR is in a relationship (directly proportional relationship) like a straight line L1 in FIG. 2, the voltages SH1 to SH4 are SH1> SH2 (1) SH3> SH4 (2) Are set so that the following relationship is obtained. When the relationship between the key touch intensity and the voltage TR is in a relationship (inverse proportional relationship) as shown by a broken line L2 in FIG. 2, the voltages SH1 to SH4 are: SH1 <SH2 (3) SH3 <SH4 .. (4) The relationship is set as follows. The comparators 8 to 11 (control means) compare the voltage TR with the reference voltages SH1 to SH4 and output a "1" signal or a "0" signal according to the comparison result. When TR> SH1, comparator 9 outputs TR
In the case of <SH2, the comparator 10 sets “1” when TR> SH3, and the comparator 11 sets “1” in case of TR <SH4.
Output a signal. Reference numerals 13 and 14 denote flip-flops (storage means), and a signal C1 output from the Q output terminal of the flip-flop 13 is output to the key press detection / key data generation circuit 2 and from the Q output terminal of the flip-flop 14. Are supplied to the tone generation circuit 4. In the above configuration, assuming that the relationship between the key touch strength and the voltage TR is a relationship represented by a straight line L1 in FIG.
The voltages SH1 to SH4 are set in advance in the relations of the expressions (1) and (2). In such a setting state, the keyboard 1
Is relatively weakly pressed and the voltage TR is at TR <SH2, the comparator 9 outputs a "1" signal and the comparator 8 outputs a "0" signal.
3 is reset, and a "0" signal is output to the key press detection / key data generation circuit 2 as the signal C1. Next, the voltage T
When R is SH2 <TR <SH1, the comparators 8 and 9 each output a "0" signal, and the signal C1 keeps the state of the "0" signal. Next, from this state, when the key of the keyboard 1 is further pressed down and the voltage TR becomes TR> SH1,
The comparators 8 and 9 output "1" and "0" signals, respectively, so that the flip-flop 13 is set and the signal C1 is inverted to "1". After that, the voltage TR becomes SH
Even when 2 <TR <SH1, the signal C1 keeps the "1" signal, and when the voltage TR becomes TR <SH2, the signal C1 returns to the "0" signal again. As described above, the signal C1 changes to the "1" signal only when the voltage TR exceeds the reference voltage SH1, and after this change, the signal C1 changes to "1" even if the voltage TR becomes lower than the reference voltage SH1.
The signal is continued and returns to the "0" signal only when the voltage TR becomes equal to or lower than the reference voltage SH2. The signal C1 performs, for example, on / off control of automatic accompaniment in the key press detection / key data generation circuit 2, or changes of the accompaniment pattern. Similarly, the signal C2 indicates that the voltage TR is equal to the reference voltage S
When the voltage exceeds H3, the signal becomes "1", and when the voltage TR becomes lower than the reference voltage SH4, the signal returns to "0". This signal C2
Thereby, for example, on / off control of various modulation effects such as echo, tremolo, vibrato, and the like, sustain length / short control, portamento, glissando on / off control, tone color control of a musical tone, and the like in the musical tone forming circuit 4 are performed. In the above embodiment, the comparator 8
The flip-flop 13 (or 14) may be reset by the output of (or 10), and the flip-flop 13 may be set by the output of the comparator 9 (or 11).
Further, TR and SH1 to SH4 are not limited to analog voltages but may be digital data. As described above, according to the present invention, the key touch state when the function control signal changes from the first state to the second state, and the first state from the second state. Since the key touch state when returning to the state is set to a different level, it is necessary to eliminate the drawback of the conventional case of the same level, that is, a situation in which the function control signal frequently changes due to a slight change in the key touch state. Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a relationship between a key touch state and an output voltage TR of a key touch detection device 6. [Description of Signs] 1 keyboard, 2 key depression detection / key data generation circuit, 4 tone generation circuit, 6 key touch detection device, 7 reference voltage generator, 8, 9, 10, 11, 11 comparator , 13, 14... Flip-flops.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Masatada Wachi               10-1 Nakazawacho, Hamamatsu City, Shizuoka Prefecture Yamaha Strain               In the formula company                (56) References JP-A-54-161924 (JP, A)                 JP-A-54-12721 (JP, A)                 Actual opening 1979-5927 (JP, U)                 JP-B-59-837 (JP, B2)

Claims (1)

(57) [Claims] (A) A keyboard composed of a plurality of keys, key press / release information indicating on / off of the keys in accordance with the operation of the keys, music to be generated
Information generating means for generating pitch selection information indicating a pitch of a sound and key touch information indicating a key touch ;
An electronic musical instrument for generating a musical tone according to the operation of the keyboard and a musical tone by automatic accompaniment according to a predetermined accompaniment pattern based on the information, pitch selection information and key touch information, and (b) storing a function control signal (C) setting a function control signal in the storage means to a second state when a key touch state represented by the key touch information becomes equal to or more than a predetermined first stage, wherein the function control signal is In a second state, when the key touch state represented by the key touch information is equal to or more than a predetermined second step smaller than the first step, the function control signal is held in the second state. Control means for setting the function control signal to the first state when the key touch state represented by the key touch information becomes equal to or less than the second stage, and (d) a function in the storage means. Based on the control signal Electronic musical instrument which is characterized in that the control of serial automatic accompaniment.