JPS6220876Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a keyboard in which musical tones are formed in a musical tone forming circuit for each finger electrode based on key press information extracted via key electrodes and finger electrodes in response to key press operations. Regarding electronic musical instruments.

Electronic musical instruments of this type have been known in the past (see, for example, Japanese Patent Publication No. 11454/1983). However, this conventional method has the problem that the same tone color is generated by the same keyboard, which limits the performance mode.

The purpose of this invention is to solve these problems and provide a new keyboard-type electronic musical instrument that can generate musical tones with different tones for each finger.

The electronic musical instrument according to this invention is characterized in that a tone setting means is attached to each tone forming circuit corresponding to each finger electrode, so that the tone can be set independently for each tone forming circuit. , embodiments shown in the accompanying drawings will be described in detail.

FIG. 1 shows the keyboard layout of an electronic musical instrument according to an embodiment of this invention, where 10 is a keyboard, 12A is a white key, 12B is a black key, and 14 is provided for each white key and each black key. This is the key electrode. Ring-shaped finger electrodes 18 are attached to each of the five fingers of the hand 16 of the player who operates the keyboard 10. When a key is pressed, a specific finger electrode 18 is pressed against a specific key 12A or 12B.
A key press signal indicating that a specific key has been pressed is extracted from the lead 18A connected to each finger electrode 18 in response to a key press operation.

FIG. 2 shows the circuit configuration of the electronic musical instrument, in which 20 is a clock pulse source, 22 is a counter that counts clock pulses from the clock pulse source 20 and generates a key code signal KC, and 24 is a decoded key code signal KC. The decoders 26A to 26E perform key scanning by sequentially supplying pulses to each key electrode 14. Decoders 26A to 26E are music synthesizer type musical tone forming circuits provided corresponding to each finger electrode 18. Since the musical tone forming circuits 26A to 26E have the same configuration and operate in the same manner, the musical tone forming circuit 26A will be described in detail below as a representative. In addition, in the case of a musical instrument that uses both hands, the musical tone forming circuit 26A
It is only necessary to provide one more set of musical tone forming circuits similar to those in ~26E.

In the tone forming circuit 26A, the latch circuit 28
The key press signal is received as the latch command signal L from the finger electrode 18 and the key code signal KC is latched.Every time a specific finger electrode 18 contacts a specific key electrode 14 during a key press operation, the key code signal KC is received as a latch command signal L. It acts to latch the key code signal corresponding to the key that is pressed. A key code signal corresponding to a pressed key sent from the latch circuit 28 is supplied to a D/A conversion circuit 30 and converted into a corresponding analog signal. D/
The analog signal sent out from the A conversion circuit 30 is
It is supplied to a voltage controlled variable frequency oscillator (VCO) 32.

The VCO 32 generates a sound source signal with a frequency corresponding to the key press, and supplies this to a voltage-controlled variable filter (VCF) 34 . The VCF 34 is used to impart desired tone characteristics to the sound source signal supplied from the VCO 32, and supplies its output signal to a voltage-controlled variable gain amplifier (VCA) 36. VCA36
is for imparting desired amplitude envelope characteristics to the musical tone signal supplied from the VCF 34.

On the other hand, the pulse width extension circuit 38 generates the key-on signal KON by extending the pulse width of the key press signal from the finger electrode 18 slightly longer than the key scanning period. In this way, the key press signal from the finger electrode 18 is converted into the key-on signal KON with a pulse width longer than the key scanning period when the key is continuously pressed from one key scanning period to the next. This is to prevent the generated musical tones from being interrupted.

The control voltage generation circuit 40 generates a large number of control voltages according to the operating positions or operating amounts of a large number of operators such as switches and volume controls arranged on the instrument panel (not shown), and converts the control voltages into an envelope. Generator (EG) 42, 44,
46 and VCF34. As a means for variably setting the control voltage, a storage or recording device such as a memory, a preset board, etc. may be used separately from or in addition to using operators such as a switch or a volume control.

EG42, 44, and 46 generate envelope signals for oscillation frequency control and shear frequency control based on the control voltage from the control voltage generation circuit 40 when the key-on signal KON from the pulse width extension circuit described above indicates that a key is pressed. It generates an envelope signal for gain control and an envelope signal for gain control, and each envelope signal is sent to the corresponding VCO32,
It is designed to supply to VCF34 and VCA36.

The oscillation frequency of the VCO 32 is controlled over time according to the envelope signal supplied from the EG 42, the damping frequency of the VCF 34 is controlled over time according to the envelope signal supplied from the EG 44, and the oscillation frequency of the VCA 36 is controlled over time according to the envelope signal supplied from the EG 44. The gain is controlled over time in response to an envelope signal supplied from. Note that the selectivity Q of the VCF 34 is set according to the control voltage supplied from the control voltage generation circuit 40.

According to the musical tone forming circuit 26A configured as described above, the performer can easily set an arbitrary tone by appropriately operating the controls on the instrument panel, and this is similar to the other musical tone forming circuits 26B. ~2
The same applies to 6E.

Musical tone signals sent from the musical tone forming circuits 26A to 26E are supplied to an output amplifier 50 via resistors 48A to 48E, respectively, where they are mixed and amplified. The musical tone signal amplified by the amplifier 50 is then supplied to a speaker 52, where it is produced as a musical tone.

As described above, according to this invention, it is possible to independently set the tone for each tone forming circuit corresponding to each finger, so it is possible to enjoy a wide variety of playing styles, and it is easy to teach tone in music lessons. For example, excellent effects such as the ability to easily insert special sound effects in dramas and the like can be obtained.

[Brief explanation of drawings]

FIG. 1 is a top view showing the keyboard arrangement of an electronic musical instrument according to an embodiment of the invention, and FIG. 2 is a block diagram showing the circuit configuration of the electronic musical instrument of FIG. 14...Key electrode, 18...Finger electrode, 26A~2
6E...Tone forming circuit, 40...Control voltage generation circuit.

Claims (1)

[Claims for Utility Model Registration] (a) A large number of key electrodes respectively arranged on a large number of keys, (b) A plurality of finger electrodes to be respectively attached to a plurality of desired fingers, (c) These A plurality of musical tone generating means are provided corresponding to finger electrodes, and each musical tone generating means generates a musical tone based on key press information retrieved via the corresponding finger electrode and the key electrode of the pressed key. (d) a plurality of timbre setting means provided corresponding to the plurality of musical tone generating means, each timbre setting means variably setting the timbre parameters independently; (e) a plurality of timbre control means provided corresponding to the plurality of musical tone generation means, each timbre control means being set by a corresponding timbre setting means; A keyboard-type electronic musical instrument, which controls the tone of a musical tone of a corresponding musical tone generating means according to a tone parameter.