JPH0293693A - reverb device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention applies reverb (reverberation, echo) to generated musical tones.
The present invention relates to a reverberation device that adds

[Summary of the invention] The present invention provides the timbre, rhythm, pitch, volume, tempo,
By changing the reverberation content according to the content of the note length, it is possible to realize reverberation that changes subtly according to the pitch, volume, etc., just like an actual musical instrument.

[Prior Art] Some conventional reverb devices or electronic musical instruments with a built-in reverb device can vary the reverb time, which indicates how long reverb continues, and the reverb density, which indicates the number of reverbs per unit time.

This allows the performer to artificially create musical tones with reverberation content tailored to a specific location.

[Problem to be solved by the invention] However, in actual musical instruments, the reverb content changes slightly depending on musical sound parameters such as pitch and volume, and in conventional reverb devices, the reverb content is fixed uniformly. Because of this, it was not possible to achieve subtle changes in reverb content like in real instruments.

The present invention has been made to solve the above-mentioned problems, and can realize reverb that is extremely close to an actual musical instrument, matches human psychology, can create a variety of reverb effects, and has a wider range of effects. The purpose of the present invention is to provide a reverberation device that can perform musical performances.

Means for Solving 1 Problem] In order to achieve the above object, the present invention is configured as follows. That is, the musical sound generation means generates and outputs a musical sound, the reverb means adds a reverb effect to this musical sound, and the musical sound parameter control means controls any one of the timbre, rhythm, pitch, volume, tempo, length, and effect of the musical sound. The reverberation content control means changes the reverberation content of the reverberation means in accordance with the parameter change.

[Function] With the above configuration, the reverb content, such as the reverb time indicating the duration of the reverb or the reverb per unit time, is determined according to changes in the timbre, rhythm, pitch, volume, tempo, tone length, and effect parameters of the musical sound. The reverb density, which indicates the number of reverberations, can be changed.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

FIG. 2 shows an overall circuit diagram of an electronic musical instrument equipped with a reverberation device.
In addition to giving the tone generator 3 a key code corresponding to the operating key, touch data corresponding to the key pressing distance or key pressing pressure of the operating key is also given to the tone generator 3. Tone color data corresponding to the tone of piano, flute, etc., rhythm data corresponding to the rhythm of rock, disco, etc., and tempo data corresponding to the set tempo are also provided to the tone generator 3. The tone generator 3 generates a pitch (frequency) according to the given key code, a volume (amplitude level of the envelope waveform) according to the given touch data, and a speed according to the given tempo data. A musical tone signal having a waveform corresponding to the timbre data and a rhythm tone signal corresponding to the rhythm data are generated. The musical tone signal and the rhythm tone signal are sent to the reverberation section 5, where the timbre, rhythm, pitch -
A reverb effect corresponding to the volume and tempo is applied, the reverb time data is converted into an analog signal by the τ-A converter 6, and the sound system 7 outputs the sound.

FIG. 1 is a diagram showing a specific circuit of the musical tone control section 1 and the reverberation section 5. The CPU II of the musical tone control section 1 inputs the tone data of piano, flute, etc. selected by the panel switch section 4. This reverb data is composed of reverb time data τ and reverb density data σ.
As shown in FIG. 3, reverb time data τ is data indicating the duration of reverberation, and reverb density data σ is data indicating the number of reverberations per unit time.

The reverb memory 12 stores a combination of reverb time data τ and reverb density data σ for each timbre, as shown in FIG. 4(1). The reverb data τ and σ in the reverb memory 12 have a pitch of A.
4. Volume is normal volume, tempo is 12 quarter notes per minute
The one at beat 0 is stored.

The reverb data τ, σ read out as described above is increased or decreased based on the reverb data correction value for each rhythm shown in FIG. 4(2).

This correction value is also stored in the reverb memory 12, and the correction value of reverb time data τ and reverb density data σ for each rhythm is stored in combination. The reverb data correction values stored in the reverb memory 12 are also stored with a pitch of A4, a normal volume, and a tempo of 120 quarter note beats per minute.

Reverb data τ read out and corrected as described above
, σ are converted into reverb data corresponding to the key code (pitch), touch data (volume), and tempo data given from the keyboard 2 based on conversion data in the conversion table memory 13.

This conversion table memory 13 is stored in (1) (2) (
3) If it is a pitch conversion table, it is converted into reverb time data τ and reverb density data σ corresponding to the pitch according to the operation key, centering on the standard pitch A4, and the volume With the conversion table, the standard normal volume evening/y-chi data is converted into reverb time data τ and reverb density data σ corresponding to touch data according to key press speed or key press pressure, and a tempo conversion table is created. If so, the reverb time data τ and reverb density data σ are converted into reverb time data τ and reverb density data σ corresponding to the set tempo centered around the standard tempo of 120 quarter note beats per minute.

On the other hand, the musical tone signal and the rhythm tone signal from the tone generator 3 are outputted via the adder 21, are delayed by the CCD 24 via the adder 23, are multiplied by attenuation data by the multiplier 25, and are adjusted in level. A slightly delayed musical tone signal, that is, a primary reverberant musical tone signal, is added to the original musical tone signal by the adder 21 and output.

This first reverberant musical tone signal is further delayed by the CCD 24 via an adder 23, is attenuated by a multiplier 25, and is made into a second reverberant musical tone signal, which is further added by an adder 21, and so on. A third reverberant musical tone signal, a fourth reverberant musical tone signal, etc. are created by the CCD 24 and the multiplier 25.
The adder 21 sequentially adds and combines the signals and outputs them. In this way, a reverb effect is applied.

The reverb density data σ converted by the above conversion table memory 3 is set in the reverb density memory 26 in the form of a reciprocal α/σ or a value β (γ − α) subtracted from a constant value (α, β, γ are constants). The programmable timer 27 applies to the CCD 24 a transfer pulse signal φ whose period becomes shorter in accordance with the reverb density data σ. This transfer pulse signal φ2 sequentially transfers the musical tone signal data in the C0D 24 one step at a time within the CCD 24, and the shorter the period, the faster the transfer speed, and the shorter the delay time of the outputted musical tone signal. The reverb density, which indicates the number of reverberations per unit time, increases accordingly.

Therefore, as shown in FIG. 5 (1), (2), and (3), the lower the pitch, the lower the volume, and the slower the tempo, the higher the reverb density. Note that the programmable timer 27 is driven to count by a predetermined clock pulse signal (t)1.

Further, the reverb time data τ converted by the conversion table memory 13 is set in the reverb time memory 28, and is applied to the multiplier 25 as the above-mentioned attenuation data to be multiplied by the musical tone signal. The smaller the reverb time data τ set in the reverb time memory 28, the faster the attenuation of the reverb musical tone signal becomes, and the shorter the reverb time indicating the duration of reverb becomes. Therefore, Fig. 5 (
As shown in 1), (2), and (3), the higher the pitch, the louder the volume, and the slower the tempo, the longer the reverb time. Note that the reverb time data τ after conversion, that is, the attenuation data, is
It takes a value between "0" and "1".

Next, the operation of the electronic musical instrument having the above configuration will be described. 6th
The figure shows a flowchart of a processing program of the CPU 11 for applying a reverb effect, and this processing is started by an interwoven command every time a key-on signal is given from the keyboard 2. That is, CPtJl
Step S1 performs key sampling on the tone color designation switch of the panel switch section 4 to determine the specified tone data. The following step S1 will be simply expressed as Sl, and the same applies to the pond step. ), reverb time data τ and reverb density data σ shown in FIG. 4 (1) corresponding to this tone data are read out from the verb memory 12 (S2
), then CPtJll key-samples the rhythm designation switch of the panel switch section 4 to determine the designated rhythm data (33), and generates the reverb time data τ and τ shown in FIG. 4 (2) according to this rhythm data. The correction value of the reverb density data σ is read out from the reverb memory 12, and the reverb time data τ and the reverb density data σ are corrected to increase or decrease (34).

Next, the CPU 11 converts the reverb time data τ and reverb density data σ into the table memory 1 based on the key code (tone) and touch data (volume) from the keyboard 2 and the set tempo data from the panel switch section 4.
Data conversion processing as shown in FIG. 5 (1), (2), and (3) is performed according to the conversion data of No. 3 (S5). This conversion may be performed based on a previously stored mathematical formula. Then, the CPU II sets the converted reverb time data τ in the reverb time memory 28, and sets the similarly converted reverb density data σ in the reverb density memory 26 (S6). As a result, a reverb effect corresponding to the timbre, rhythm, pitch, volume, and tempo is added to the generated musical sound signal.

In this way, the reverberation content can be changed according to the timbre, rhythm, pitch, volume, and tempo, and it is possible to generate and emit musical tones with reverberation content that is extremely close to that of an actual musical instrument.

The present invention is not limited to the above-mentioned embodiments, and can be modified in various ways without departing from the spirit of the present invention. The conversion characteristic of the conversion table memory 13 may be a characteristic other than that shown in FIG. 5, for example, it may be a partially constant value, it may not be converted, it may be proportional to a reciprocal number or a plurality of powers of the reciprocal number, etc.

In addition, we have further provided conversion tables for the presence or absence of various effects such as mute effect, tremulant effect, unsample effect, chorus effect, vibrato effect, tremolo effect, sustain effect, etc., and conversion tables for tone length data. The reverb content may be changed according to the effect and note length to obtain an appropriate reverb effect, and the data set in the reverb density memory 26 and reverb time memory 28 may be exp(-δτT)β,
The value may change as time T elapses, such as exp(-δσT)-ε (δ and ε are constants), which causes the reverb density and reverb level to change significantly over time.

Furthermore, the reverb content to be controlled may include reverb density, reverb time, reverb level, etc. The circuit that gives += to the reverb is not only a series of CCD24s, but also a shift register, BBC, and spring delay. It may be realized by a body or an analog circuit.

[Effects of the Invention] As detailed above, according to the present invention, the reverb content, such as the reverb time indicating the duration of the reverb or the per unit time, is determined according to changes in the parameters of the pitch, volume, and timbre of the musical sound. The reverb density, which indicates the number of reverbs, can be changed, and the reverb content can be subtly changed depending on the tone, rhythm, pitch, volume, tempo, note length, effects, etc., just like a real musical instrument. It is possible to supply reverb content that perfectly matches human psychology with respect to changes in rhythm, pitch, volume, tempo, tone length, and effects.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention.
The figure shows a specific circuit diagram of the reverberation section 5, Figure 2 shows the overall circuit diagram of an electronic musical instrument equipped with a reverberation device, and Figure 3 shows the reverb time data and reverb density data σ that determine the reverb content. 4 is a diagram showing the parameters, and FIG. 4 is a diagram showing the contents of reverb time data τ and reverb density data σ stored in the reverb memory 12 and their correction contents. FIG.
FIG. 6 is a diagram showing the contents of conversion of reverb time data τ and reverb density data σ stored in FIG. DESCRIPTION OF SYMBOLS 1... Musical tone control section, 3... Tone generator, 5... Reverb section, 11... CPU, 12...
... Reverb memory, 13... Conversion table memory,
24...CCD, 26...Reverb density memory, 27
...Programmable timer, 28...Reverb time memory. Nobarb Data Reverb Day Collection Figure 6 L〒艷-1 Nobarb Data Summer Special No. 1 Student

Claims (1)

[Scope of Claims] 1. A musical sound generating means for generating and outputting a musical sound; a reverb means for adding a reverb effect to the musical sound from the musical sound generating means; pitch,
A musical tone parameter control means for controlling and changing the parameters of volume, tempo, note length, and effects, and a reverb content control means for changing reverb content in accordance with the control content of the musical tone parameter control means. Reverb device.