JPS6022391Y2 - electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument of the type in which a plurality of musical tone modulation circuits are respectively arranged in parallel musical tone signal transmission paths to produce a so-called unsampled effect or orchestral effect.

Conventionally proposed electronic musical instruments of this type include those in which musical tone signals from multiple musical tone modulation circuits are electrically mixed and guided to a single speaker device for sound generation, and those in which musical tone signals from multiple musical tone modulation circuits are mixed electrically and guided to a single speaker device to produce sound. It is known that musical tones are guided to a plurality of corresponding speaker devices and emitted, thereby spatially mixing the musical tones.

However, the former type of electronic musical instrument has the disadvantage of lacking a sense of realism or three-dimensionality, while the latter type of electronic musical instrument has the disadvantage of being large in weight and size, and also in high cost.

The purpose of this invention is to provide a new electronic musical instrument that eliminates the drawbacks of the prior art.

The electronic musical instrument according to this invention is characterized by being equipped with an FM stereo receiver so that musical tones are mixed spatially between the speaker device of the instrument body and the speaker device of the FM stereo receiver. The embodiment shown in the drawings will be described in detail.

The figure shows an electronic musical instrument according to an embodiment of the invention, in which 10 is the main body of the electronic musical instrument, 11 is a keyboard circuit including a large number of keys and key switches that are linked to each key switch, and 12 is key press information from the keyboard circuit 11. This is a musical tone forming circuit that forms musical tone signals based on the following.

The musical tone signal sent from the musical tone forming circuit 12 is divided into three parallel
The signal is distributed and supplied to three musical tone signal transmission paths A, B, and C.

Musical tone signal transmission paths A, B, and C each have a BBD (
Musical tone modulation circuits 13, 14, and 15 consisting of a packet brigade device) are arranged, and these musical tone modulation circuits 13, 14, and 15 apply frequency modulation or phase modulation to the musical tone signal using the signal delay effect of the BBD. It is designed to apply .

In the circuit for controlling the musical tone modulation circuits 13 to 15, a low frequency oscillator (LFO) 16. 17 generates sinusoidal low frequency signals having different frequencies. For example, LFO 16 generates a low frequency signal of several Hz, and the LF
O17 generates a low frequency signal of several IQHz.

The low frequency signal from the LFO 16 is sequentially shifted in phase by, for example, 90° in phase shift circuits 18 and 20, and the low frequency signal from the LFO 17 is also sequentially shifted in phase by, for example, 90 degrees in phase shift circuits 19 and 21.
The phase is shifted by 0°.

The low frequency signals from the LFOs 16 and 17 are mixed at a mixing point M1 and supplied to a voltage controlled variable frequency oscillator (VCO) 22 to periodically and delicately change the oscillation frequency of the VCO 22.

The oscillation output of the VCO 22 is supplied to the tone modulation circuit 13 as a BBD transfer lock signal.

Similarly, the 90° phase-shifted low frequency signals from the phase shift circuits 18 and 19 are mixed at the mixing point M2 and supplied to the VCO 23, and the 180° phase shifted signals from the phase shift circuits 20 and 21 are mixed at the mixing point M2 and supplied to the VCO 23. The low frequency signal is mixed at mixing point M3 and sent to VCO2.
4.

The oscillation outputs of the VCOs 23 and 24 are respectively supplied to musical tone modulation circuits 14 and 15 as BBD transfer lock signals, thereby enabling musical tone modulation.

On the output side of the musical tone modulation circuits 14 and 15, normally closed switches S1. S2 are provided respectively, and these switches S1 . When S2 is closed, the musical tone signals from the musical tone modulation circuits 13, 14, and 15 are guided to the mixing point MX via resistors R4, R2, and R3, where they are mixed and then supplied to the power amplifier 25. be done.

Further, when the switches S and S2 are opened, only the musical tone signal from the musical tone modulation circuit 13 is supplied to the power amplifier 25 via the resistor R□.

A musical tone signal from the power amplifier 25 is supplied to a speaker device including three speakers, a tweeter 26, a squawker 27, and a woofer 28, and is converted into sound.

The signal lines L1 to La connected to the respective output ends of the musical tone modulation circuits 13, 14, and 15 are connected to an external amplifier or public address (PA), etc. via appropriate output lines. Signal line L2. The musical tone signal No. 3 is shunted and also supplied to the FM stereo transmitter 29.

The FM stereo transmitter 29 has a normally open transmission control switch S3 that is linked to the aforementioned switches S□ and S2, and when the switch S3 is closed, the switches S1... In the illustrated state in which S2 is opened, the musical tone signals from the musical tone modulation circuits 14 and 15 are multiplexed and wirelessly transmitted.

The musical tone signal transmitted from the transmitter 29 is received by the FM stereo receiver 30, demultiplexed, and reproduced.
) and left (L) speakers 31 and 32, respectively.

The speakers 31 and 32 are preferably so-called separate type speaker systems, and are preferably set at appropriate positions on both sides of the speaker device of the main body of the musical instrument.

In this way, the musical tone signal from the musical tone modulation circuit 13 is emitted by the speaker device of the musical instrument body, and the musical tone signal from the musical tone modulation circuit 14.15 is transmitted to the FM stereo receiver 3.
Since the musical tones are produced by the speakers 31 and 32 of 0 and spatially mixed, it is possible to easily enjoy a three-channel unsampled orchestral effect full of realism or three-dimensionality.

Note that when switch S2 is opened, switch S1. When S2 is closed, the transmitter 29 does not transmit, and the musical tone signals from the musical tone modulation circuits 14 and 15 are transmitted to the mixing point MX via switches S1 and S2, and further via resistors R2 and R3.
are electrically mixed and output from a speaker device.

As described above, this invention has the advantage of allowing you to enjoy a musical tone modulation effect rich in presence or three-dimensionality in a relatively simple and inexpensive manner without increasing the weight or size of the instrument itself. It is something that provides action and effect.

[Brief explanation of drawings]

The figure is a block diagram showing an electronic musical instrument according to an embodiment of the invention. 10...Electronic musical instrument body, 13,14.15...
...Musical tone modulation circuit, 29...FM stereo transmitter, 30...FM stereo receiver, S□~
S3......Interlocking switch.

Claims (1)

[Scope of utility model registration request] In an electronic musical instrument, a musical tone modulation circuit is arranged in each of a plurality of musical tone signal transmission paths, and a musical tone signal from each musical tone modulation circuit is guided to a speaker device to produce sound, and a musical tone signal to be supplied to the speaker device is output. an FM stereo transmitter that wirelessly transmits musical tone signals from musical tone modulation circuits other than one musical tone modulation circuit, and substantially prevents the musical tone signals being transmitted by this transmitter from being supplied to the speaker device. 1. An electronic musical instrument characterized in that an FM stereo receiver is provided with means for blocking the reproduction of musical tone signals from the transmitter.