JPS60162296A - Effect unit for 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 [Field of Industrial Application] This invention relates to an effect device used in an electronic musical instrument such as an electronic organ.

[Prior art]

Effect devices for electronic musical instruments in recent years include, for example, BBD (<Cerato Brigade Device) and CcD (Charge Brigade Device).
Because it is constructed using expensive circuit elements such as (coupled devices) and is therefore expensive, it is not only possible to use one with a single musical tone generation series, but also to use expensive circuit elements such as TJKC upper keyboard), LK.
Even in an electronic musical instrument having a lower keyboard and a plurality of tone generation systems, only one system of effect devices is provided.

By the way, in the case of an organ-type musical tone, such as a jazz organ tone, a tremolo effect with a fast modulation speed is more suitable for the tone than an effect with a slow modulation speed such as a chorus effect. The modulation speed of the chorus effect is around 0.7 h, and the modulation speed of the tremolo effect is 7 h.
It is around z.

However, in the above-mentioned conventional electronic musical instruments, effects such as chorus effect and LKK tone tremolo effect cannot be applied to T and IK tones, and when the chorus effect is selected for TJK tones, LKK tones cannot be applied. Even if the tone is a jazz organ, a chorus effect will be added. Of course, such a problem can be solved by providing an effect device for each tone generation series, but such a configuration increases the cost as described above and is not suitable for popular electronic musical instruments.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a simple and inexpensive effect device for an electronic musical instrument that can automatically apply effects other than the selected effect to a musical tone of a certain timbre.

[Structure of the invention]

The present invention provides an effect selection means for selecting a first effect to be applied to a generated musical tone, and a first effect for applying the first effect to a musical tone signal when the effect selection means selects to apply the first effect. an effect device for an electronic musical instrument having a second effect imparting means for imparting a second effect to a musical tone signal, a specific tone being selected by the tone selection means, and an effect imparting being applied by the effect selection means; When selected, a control means is provided to enable the effect imparting means of 1!42.

〔Example〕

FIG. 1 is a diagram showing the configuration of an electronic musical instrument to which an effect device according to an embodiment of the present invention is applied. In this figure, the keyboard circuit 1 detects a pressed key in the UK,
This circuit outputs the key code KC and key-on signal KON for the same key.

Here, the key-on signal KON becomes "1" when any key of UK is turned on, and becomes "0" when it is turned off.
Similarly, the keyboard circuit 2 detects the pressed key in LK and outputs the key code KC and key-on signal KON of the key.The tone selection circuit (tone selection means) 3.4 Each has a UK musical tone (piano,
This circuit sets the tone of the LK' musical tone (flute, jazz organ, etc.), and outputs a tone code TC corresponding to the set tone. The musical tone signal generation circuits 5 and 6 each have
Musical tone signals TSU・TST, (
This is a circuit that forms and outputs analog signals (analog signals), and the details will be described later. The effect selection circuit (effect selection means) 7 is a circuit for selecting that a chorus effect should be added to a musical tone;
A signal indicating the effect selection state is output to the effect applying circuit 8 (first effect applying means). In this case, the performer can set the chorus effect in the four ways shown in Table 1, and the signal MDU shown in the table corresponds to each setting.
, MDL are each output to the effect imparting circuit 8.

The effect imparting circuit 8 in Table 1 is a circuit which imparts a chorus effect to a musical tone signal, and includes a plurality of BBDs, each BBD, which delays the musical tone signal.
The effect selection circuit 7 determines the period of the clock pulse supplied to the BD.
A control circuit that controls based on a signal supplied from each B
It consists of a circuit that mixes the output of the BD, a low-pass filter, etc. Then, for example, to the signal fDU=
In the case of “1” and M D L = “0” (Table 1 ■),
After applying a predetermined phase modulation (delay time modulation) and amplitude modulation to the musical tone signal TSU, it is mixed with the musical tone signal TSL and output, so that MDU = "0", MD L = "'1'
In case 1 (Table 2 ■), the musical tone signal TSL is mixed with the post-musical tone signal TSU which has undergone the above modulation and is output. Table ■)
mixes the musical tone signals TSU and TSL, adds the above modulation, and outputs the resultant mixture. The effect imparting circuit 8 is a known circuit, and can be constructed using, for example, the one disclosed in Japanese Patent Laid-Open No. 14894/1983.

The sound system 9 amplifies the musical tone signal G output from the effect imparting circuit 8, and produces a musical tone from a speaker.

Next, FIG. 2 is a block diagram showing details of the musical tone signal generating circuits 5 and 6. In this figure, a vibrato data generation circuit 11 (second effect imparting means) is for imparting a vibrato effect to a musical tone, and is synchronized with the rise of a key-on signal KON supplied via a terminal T1. Very low frequency (for example, 1311z) that performs oscillation operation
It consists of a Chenggen sine wave (or triangular wave) oscillator and an A/D (analog/digital) converter that successively converts the output of this oscillator into digital data, and the output of the A/D converter is vibrato data VD. as gate circuit 12
Output to. The gate circuit 12 outputs the vibrato data fiVDt7 to the Aze generator 13 when the signal C1 is in the open state υ when the signal C1 is ``0'', and outputs data ``1'' when the signal is ``0''.

The musical tone waveform generation circuit 14 is composed of, for example, a waveform memory having a plurality of memory blocks, and each memory block stores in advance the instantaneous value of one cycle of the musical tone waveform corresponding to each tone color. Then, one of the memory blocks is selected by the tone code TC supplied via the terminal T3,
The waveform data in the selected storage block is read out based on the phase data PD output from the 7-second generator 13 and output as musical tone data GD.

The phase generator 13 generates data of a value proportional to the pitch of the key indicated by the key code KC supplied via the terminal T2 (hereinafter referred to as F number), and generates the data of the gate circuit 12 based on the F number. The outputs are multiplied and the multiplication results are accumulated sequentially.In this case, when the accumulated value reaches a certain value, the accumulated value is cleared and then the accumulation is performed again.

This accumulated value is output as phase data I'D.

Therefore, when the pitch of the key indicated by the key code KC is high, each waveform data (instantaneous value of the musical sound waveform) in the memory block of the musical sound waveform generating circuit 14 is read out at high speed. A high-frequency musical tone signal is formed by the circuit. Conversely, when the pitch of the key indicated by the key code KC is low, a low frequency musical tone signal is generated. Further, when the gate circuit 12 is in an open state, frequency modulation is applied to the formed musical tone signal based on the vibrato data VD, thereby imparting a vibrato effect to the musical tone signal.

Next, the amplitude modulation data generation circuit 16 (second effect imparting means) is for imparting a tremolo effect to the musical tone signal, and similarly to the vibrato data generation circuit 11, it has a sine wave (
It consists of an oscillator (or sawtooth wave) and an A/T converter. In this case, the oscillation frequency of the sine wave oscillator is approximately 7
It is h. The output of the A/D converter is then supplied to the gate circuit 17 as tremolo data TD. The gate circuit 17 is in an open state when the signal C2 is a ``1'' signal, and the gate circuit 17 is in an open state when the signal C2 is a ``0'' signal.
When the signal is ``, data ``1'' is output. The envelope data generation circuit 18 is for adding an amplitude envelope to the musical tone signal, and generates each instantaneous value (envelope data ED) of the envelope waveform corresponding to the tone code TCIC.
The signals are sequentially output based on the key-on signal KON. The multiplication circuit 19 adds envelope data ED and the gate circuit 1 to the musical tone data GD output from the musical waveform generation circuit 14.
7 and outputs this multiplication result to a D/A (digital/analog) converter 20. In this case, an envelope is added to the musical tone signal by multiplying the musical tone data GD by the envelope data ED. Further, when the gate circuit 17 enters the ρ11 state, the musical tone signal is amplitude-modulated based on the tremolo data TDIC, thereby imparting a tremolo effect to the musical tone signal. D/A converter 20
converts the output of the multiplication circuit 19 into an analog signal and outputs it to the effect adding circuit 8 via the terminal T4 as a musical tone signal 'l'sU (or TSL).

The control circuit 21 is supplied with a code indicating the tone of a jazz organ as the tone code TC, and when the signal MDU (or MDL> supplied via the terminal T5 is a "1" signal (that is, the effect selection circuit 7 6 respectively as signals C1 and C2 (when the chorus effect is selected).
Outputs a 1'' signal, otherwise outputs a 0' signal.

According to the above embodiment, when the chorus effect is selected for both the UK musical tone and the LK musical tone, and the tone of the jazz organ is selected, the one musical tone signal TS
A vibrato effect, a tremolo effect, and a chorus effect are superimposed on U (TSL).

Next, modifications of the above embodiment will be listed below.

■ The vibrato data generation circuit 11 and the amplitude modulation data generation circuit 16 are composed of a memory in which vibrato data and tremolo data are stored in advance, a counter that supplies an address signal to this memory, and a gate circuit that supplies a clock pulse to this counter. It may be configured.

(2) The musical sound waveform generation circuit 14 may use any musical sound waveform generation method such as an FM (frequency modulation) system.

(2) The control circuit 21 may open only one of the gate circuits 12 and 17.

■ The control circuit 21 detects combinations other than the combination of jazz organ and chorus effect and activates the gate circuits 12.17.
It may be open.

■ The control circuit 21 controls the gate circuit 12 for multiple tones.
．． 17 may be opened.

(2) In this case, the frequency and amplitude of the vibrato data VD and remolo data MD output from the vibrato data generation circuit 11 and the amplitude modulation data generation circuit 16 may be changed depending on the timbre.

(2) In the embodiment, there are two musical tone generation sequences, but the present invention may be applied to a case where there is only one musical tone generation sequence.

■ Although the embodiment uses a two-stage keyboard, the present invention can be applied to a single-stage keyboard that divides the key range and forms two series of musical tones, or to one that operates multiple series of musical tone generation circuits with one key press. You may.

■ In the example, the musical tone generation circuit was configured digitally, but
An analog configuration may also be used.

(2) In the embodiment, a vibrato effect, a tremolo effect, and a chorus effect are applied in series, but the effects may be applied in any order, or each effect may be applied in parallel.

(2) In the embodiment, a chorus effect has been described as an effect imparted by the effect imparting circuit, but the present invention is not limited to the chorus effect, and other effects such as an unsampled effect and a celeste effect may be used. In short, the ``rfgl effect'' and ``second effect'' in this invention are not limited to those of the examples,
Any desired effect may be employed.

In the embodiment O, a musical tone signal generating circuit is provided for each musical tone generation series, but a musical tone signal generating circuit for forming and outputting musical tone signals of each series by time division may also be provided.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to automatically apply a second effect in addition to the selected first effect to a musical tone of a specific tone, and as a result, it is more effective than before. It becomes possible to impart a unique effect to a musical tone. Further, the effective implementation according to the present invention can be constructed at a relatively low cost, and as a result, it has the advantage of being applicable to popular electronic musical instruments.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument to which an effect device according to an embodiment of the present invention is applied, and FIG. 2 is a block diagram showing a detailed example of musical tone signal generating circuits 5 and 6 in the electronic musical instrument. 3.4... Tone selection circuit (tone selection means), 7.
...Effect selection means (effect selection circuit), 8...
Effect imparting circuit (first effect imparting means), 11, music vibrato data generation circuit (second effect imparting means), 16...
...Amplitude modulation data generation circuit (second effect imparting means)
, 21...control circuit (control means). Applicant: Nihon Naki Manufacturing Co., Ltd.

Claims (1)

[Claims] an effect selection means for selecting that the effect of whistle 1 should be applied to the generated musical sound; and a first effect application means for applying the first effect to the musical tone signal when the effect selection means selects to apply the effect. An effect device for an electronic musical instrument comprising: a second effect imparting means for imparting a second effect to the musical tone signal; and a tone selecting means, in which a specific tone is selected;
An effect device for an electronic musical instrument, further comprising: control means for enabling the second effect imparting means when effect imparting is selected in the effect selecting means.