JPH06214566A - Method for interpolating timbre of electronic musical instrument equipped with drawbar - Google Patents

Abstract

PURPOSE:To prepare delicate variation even for the same timbre at a request and smoothly vary the timbre. CONSTITUTION:When the timbre of the electronic musical instrument equipped with drawbars is varied, a volume value before the variation and a volume value after the variation are interpolated at several points, time variation is given under the control of a CPU, and the timbre is gradually varied to smoothly/let the timbre be a target volume value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone color interpolation method in an electronic musical instrument having a drawbar.

[0002]

2. Description of the Related Art The Hammond Organ.RTM. Has nine different pitch (feet) assigned volumes, called drawbars, which have been inherited from the first model. In addition, a device called a preset switch for storing the value of the volume is provided.

The drawbar is one of the characteristics of the Hammond Organ (registered trademark), which was inherited from the first model A type, which was released in 1934 (US Pat.
956, 350, see the patent of April 24, 1934), 9
Sine waves (sine waves) with different pitches (sound pitches) are assigned to the volumes of the book, and various tones can be created freely by combining the volumes. The timbre variations are said to be 253 million.

As shown in FIG. 4, the central C (dot) at 8 '.
When is pressed, the pitch of the sound of each drawbar is as shown by the diagonal lines in FIG. In addition, the notation “feet (′)” written on the drawbar is originally a word that is diverted from the length of the pipe of the pipe organ. 1 for each drawbar
The numbers from 8 to 8 are shown, but this is a mark for indicating the operation amount of the volume for creating a tone and also for easily setting. For example, when a clarinet is blown, the air vibrates inside the tube, and the fundamental tone (8 '), the third overtone (2-2 / 3') and the fifth overtone (1-3 / 5 ') are generated at the same time. In this case, pull out the three drawbars and you will hear the clarinet sound. Of the three drawbars, if you pull out the right side a little and the left side a little, (00
2040800) There are many high-pitched sound components, giving a hard sound feeling. On the contrary, it is also possible to draw out the drawbar on the left side a lot to create a soft tone (00 8040 200). In this way, you can use the drawbars to create subtle changes in the tone, even with the same tone, depending on the flow and taste of the song.

There are the following two methods for changing the timbre. 1) A method in which each foot of the drawbar is manually moved freely to change the timbre.

In this case, the tone color can be changed smoothly by moving the volume while playing. However, it requires a considerable technique for the performer to freely operate the nine volumes. In particular, the organ player plays with a melody with his right hand, a chord with his left hand, a pedal keyboard with his left foot, and an expression with his right and both hands. It is very difficult to move the drawbar on it. 2) By selecting the switch in which the preset 9 volume values are stored during performance,
How to change the timbre.

In this case, since only the switch is selected, the tone color can be easily changed even during the performance. However, since the timbre changes abruptly, the performance is considerably limited. For example, even if it is desired to change the volume value according to the player's emotional feeling, it is extremely difficult to express the player's emotions because the tone is changed by switching the switch at the same time.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and the object is to interpolate the value of the volume before change and the value of the volume after change at some points, and
By controlling the PU, a change in time is given to gradually change the timbre, so that the target volume value is smoothly set.

Further, it is also included in the object of the present invention to generate an effect which is difficult to realize manually by changing the nine volumes at the same time.

[0010]

In order to solve the above-mentioned problems, the present invention interpolates two types of registration for an electronic musical instrument equipped with a drawbar. Therefore, a change in time is given by the control of the CPU and the timbre is gradually changed. By taking such a measure, a smooth timbre change is produced.

Nine drawbars can be easily controlled by moving the time change of the volume with a controller (pressure, modulation). Therefore, for example, even if both hands and both feet are closed, it is possible to freely and smoothly change the tone color by using the pressure. This is a dramatic improvement in expressiveness for the performer and gives the organ the possibility of a new playing style.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
FIG. 3 is a block diagram showing an embodiment of an electronic musical instrument having a drawbar for performing the tone color interpolation method according to the present invention.

The illustrated electronic musical instrument is a device for storing the value of a volume consisting of nine pieces, a device for storing the registration of the drawbar, for example, two or more preset switches or drawbars, and a waveform is synthesized from those data. It is composed of an arithmetic unit and a controller. The two preset switches A and B can initially set variable values, and the drawbars A and B set variable values by actual operation.

The volume value before change is A (a1, a
2, a3, a4, a5, a6, a7, a8, a9). In addition, the value of the volume after the change is B (b1, b2,
b3, b4, b5, b6, b7, b8, b9).

Here, an and bn (n = 1 to 9) are the values of each draw bar. In this case, when changing the value of the volume from A to B, the value of 9 steps is considered. The data of 9 steps by the combination of the values an and bn of each drawbar is provided in a storage device (ROM), and is read out from the storage device each time one of the variable values an and bn changes, and written in a designated RAM area A. (See Fig. 3).

As a means for reading out the RAM area A, a flag serving as a step pointer is provided, and every time this flag is changed, 9 lines of data are read out from the specified RAM area A, and the data is a waveform synthesizing arithmetic unit. Written in. The following four methods can be used to change the step pointer. 1) The step pointer is changed by the time change by the timer of the CPU. 2) Change the step pointer according to the strength of the controller pressure. 3) Change the step pointer according to the modulation value that is the controller. 4) The step pointer is changed by controlling an external electronic device (electronic musical instrument, sequencer, etc.) via MIDI.

The effects of the above four methods are as follows. In the case of 1), when a preset switch is selected during performance, the timbre changes smoothly, so that the player can play without feeling discomfort. In the case of 2), since the pointer changes linearly, the emotion of the performer can be expressed as it is. In the case of 3), it is necessary to control nine drawbars in the past, but it can be controlled by one controller. In the case of 4), the emotional expression of the performer can be recorded and reproduced as it is, especially when using a sequencer.

[0018]

Since the present invention is constructed and operates as described above, the value of the volume before and after the change is interpolated by the time change given by the CPU control.
As shown in (b), there is an effect that the target volume value can be smoothly approached.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic musical instrument having a drawbar according to an embodiment of a tone color complementing method according to the present invention.

FIG. 2A is a graph showing a change in volume value according to a conventional method. (B) A graph showing changes in the value of the volume according to the present invention.

FIG. 3 is an explanatory view showing a means for reading a ram area according to the present invention.

FIG. 4 is an explanatory diagram of a drawbar of Hammond Organ (registered trademark).

Claims (5)

[Claims] 1. A method of interpolating a tone color in an electronic musical instrument equipped with a drawbar, wherein two types of registrations are interpolated, and a time change is given by a control of a CPU to gradually change the tone color. A tone color interpolation method for an electronic musical instrument having a drawbar that causes a smooth tone change. 2. A value of n steps is set when changing the value of the device for storing the registration of the drawbar from A to B, and the drawbar values a1, a2 ... a before the change are set.
Data of n steps, which is a combination of n and the changed drawbar values b1, b2 ... bn, is stored in a storage device, and is read out from the storage device whenever any of the drawbar values changes, and designated RAM is stored. By writing to the area and changing the flag of the step pointer provided as a means for reading the same ram area, the data for n lines can be read from the designated ram area, and the step pointer can be changed by the CPU or its controller. A method for interpolating a tone color in an electronic musical instrument comprising the drawbar according to claim 1. 3. A tone color interpolating method in an electronic musical instrument having a drawbar according to claim 2, wherein the step pointer is changed by a time change by a timer of the CPU. 4. A tone color interpolating method in an electronic musical instrument having a drawbar according to claim 2, wherein the step pointer is changed according to the intensity of pressure or the value of modulation as a controller. 5. The tone color interpolating method in an electronic musical instrument having a drawbar according to claim 2, wherein the step pointer is changed by controlling an external electronic musical instrument via MIDI.