JPH04149498A - Transposition device - Google Patents

Abstract

PURPOSE:To easily recognize a keynote position and speedily and accurately obtain a desired keynote position by making a display corresponding to the depression of a switch means on a display means when a transposition mode is instructed and selecting one keynote corresponding to the depression. CONSTITUTION:When transposition is performed, one or two of switch means 2a - 8a provided corresponding to plural keynotes are pressed in combination while an entry into the transpotion mode is instructed by a motor transposing means 1 to select one keynote. Further, the depressed switch means among 2a - 8a are displayed on display means 2b - 8b and which keynote is currently selected is displayed. Consequently, the current keynote position can easily be recognized irrelevantly to a visual angle and a desired keynote position can speedily and accurately be obtained.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a transposition device used in electronic musical instruments such as synthesizers, electronic pianos, and electronic organs, and particularly relates to a transposition device that can easily and accurately perform transposition. The present invention relates to a transposition device that allows transposition to be performed.

(Prior Art) In recent years, electronic musical instruments and the like have become widespread, and instruments with a transpose function have been developed.

This transpose function allows you to change the keynote written in the score, for example, by changing the keynote written in the score. ! This transposes complex music that is expressed as if it were played using a large number of keys so that it can be played using only the white keys.

As a device for specifying such transpose changes,
Conventionally, a device as shown in FIG. 3 has been known.

FIG. 5A shows an apparatus for changing the transposition using a sliding switch provided on an operation panel (not shown). That is, this device includes a knob 31 that is slidable in the direction of the arrow shown in the figure, and a symbol (F# to F) 32 stamped above the knob 31 and indicating the type of keynote. A mark 33 for positioning is engraved on the knob 31.

To change the transposition, the performer must turn knob 3.
1 and slide it in the direction of the arrow shown in the figure, aligning the marking 33 of the knob with the symbol 32 indicating the type of keynote, you can raise the keynote in semitone steps from F# to F within the range of one octave, or It is now possible to lower it.

FIG. 2B shows an apparatus for changing the transposition using a rotary switch provided on an operation panel (not shown). That is, this device is comprised of a knob 41 that is rotatable in the direction of the arrow shown in the figure, and a symbol (F# to F) 42 engraved around the knob 41 to indicate the type of keynote. A mark 43 for positioning is engraved on the knob 41.

To change the transposition, the performer must turn knob 4.
1 and rotate it in the direction of the arrow shown in the figure to align the marking 43 of the knob 41 with the symbol 42 indicating the type of keynote, in the same way as described above, within the range of ] octave, F#
The keynote can be raised or lowered in semitone increments from to F.

However, those that use a slide type switch or rotary type switch to change the transposition as described above,
Mark 33 on knob 31 (or 41) depending on viewing angle
(or 43) and the engraved symbol 32 (or 42) representing the keynote, which has the disadvantage that it is easy to misidentify the current position of the keynote.

Furthermore, since both the slide type switch and the rotary type switch change the keynote position in stages, they have the disadvantage that they cannot be immediately and directly set to the desired keynote.

Furthermore, although it is related to the above-mentioned viewing angle degree, in the process of changing the keynote position step by step, there are cases where the keynote position is erroneously set to an adjacent keynote, resulting in poor operability.

(Issue A to be Solved by the Invention) As described above, this invention uses a slide type switch or a rotary type switch to change the transpose. The disadvantage is that the current keynote position may be easily misunderstood due to a gap between This was done in order to solve the problem of poor operability, which occurs when the keynote position is incorrectly aligned with the adjacent keynote in the process of changing the keynote position. It is an object of the present invention to provide a transpose device with excellent operability, which can easily recognize the keynote position, and can quickly and accurately match the keynote position to a desired keynote position.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the transpose device of the present invention includes a mode transition means for instructing to enter a transpose mode, and is compatible with a plurality of ali tones. and a display means provided corresponding to each of the plurality of switch means, and when a transpose mode is instructed by the mode transition means,
Features (functions) characterized in that by pressing the switch means, a display corresponding to the press is made on the display means, and one keynote is selected in response to the press.The present invention provides the following features: , with the mode transition means instructing to enter the transpose mode, one or two of the switch means provided corresponding to a plurality of keynotes.
pressing a combination of two or more keys, thereby selecting one keynote, and displaying the pressed switch means;
This is designed to display which keynote is currently selected. This makes it possible to easily recognize the current keynote position regardless of the viewing angle, and to quickly and accurately match the desired keynote position.

(Embodiment) FIG. 2 is a schematic block diagram showing the overall configuration of an electronic musical instrument to which a transpose device according to the present invention is applied.

In the figure, II is a keyboard switch group, which includes a keyboard and a key scan circuit for detecting the pressed state of each key.

Reference numeral 12 denotes a group of panel switches, in addition to various switches such as a power switch, a mode designation switch, a tone selection switch, and a volume control switch, there is also a mode transition switch 1 for transitioning to a transpose mode, which is directly related to the features of the present invention.
, selection switches 2a to 8a for selecting a desired tone
, and indicators 2b to 8b. Details of these will be described later. In addition, the set status of each switch is
Similar to the keyboard switch group 11, it is detected by an internal panel scan circuit.

Reference numeral 13 denotes a switch interface, which checks the states of the keyboard switch group 11 and panel switch group 12, and checks the panel switch data that is in the ON state, the Mg1 code and touch that are newly turned on, and the newly i turned off! It outputs an iF code. Note that the touch information is generated by a known touch detection circuit (not shown).

A central processing unit (CPU) 14 controls each part of the electronic musical instrument according to a program stored in a program memory section of the memory 15.

The memory 15 is composed of a ROM and a RAM, and the ROM contains a program for operating the CPU 14, tone color data, and other various fixed data. Further, the RAM is used to store the state of the system and as a work area.

Reference numeral 17 denotes a sound source circuit, which generates musical tone signals in response to instructions from the CPU 14. A waveform memory 18 is connected to this sound source circuit 17.

The switch interface 13, CPU 14, memory 15, and sound source circuit 17 are interconnected via a system bus 21.

Further, the digital musical tone signal outputted from the tone generator circuit 17 is sent to a D/A converter 19.

19 is D/A*tl! It is a device that converts an input digital musical tone signal into an analog musical tone signal. The analog musical tone signal converted by this D/A converter 19 is
The signal is supplied to the acoustic circuit 20.

Reference numeral 20 denotes an acoustic circuit, which converts an input analog musical tone signal as an electric signal into an acoustic signal. The acoustic circuit 20 emits sound using a sound generating means such as a speaker or headphones.

FIG. 1 shows only the portion of the panel switch group 12 of the operation panel (not shown) related to transposition change.

In the figure, reference numeral 1 denotes, for example, a push button type mode transition switch, which is used to enter the transpose mode. That is, while the mode transition switch 1 is pressed down, the state of transpose mode is maintained.

28 to 8a are, for example, push button type selection switches. The selection switches 28 to 8a are for keynotes (C, D, E, F, G) corresponding to the white keys of the keyboard.

Only A and B) are provided.

2b to 8b are indicators composed of, for example, LEDs. These indicators 2b to 8b are connected to the selection switches 28 to 8.
In the transpose mode, when any of the selection switches 2a to 8a is pressed, the indicators 2b to 8b corresponding to the pressed selection switches 28 to 8a are lit. It looks like this.

9 is a stamp indicating the keynote, and from the semitone side C1C#, D,
There are 12 types engraved: D#, E, F, F#, G, G#, A, A#, and B.

Next, the transpose change processing in the above configuration will be mainly explained.

First, when a performer wants to change the transpose, he or she presses any one of the selection switches 28 to 8a while pressing the mode transition switch 1 on the operation panel.

In this case, to match the keynote corresponding to the white key, one selection switch is pressed, and to match the keynote corresponding to the black key, two switches corresponding to the white keys adjacent on both sides thereof are pressed simultaneously.

For example, when setting the keynote to F, select switch 5a
Press and select switches 5a and 6 to match F#.
Press a and a at the same time.

Further, among the selection switches 2a to 8a, an indicator (any one of 2b to 8b) corresponding to the pressed selection switch lights up. This lighting state turns off when the mode transition switch 1 is released.

Next, the pressed states of the selection switches 28 to 8a, that is, the keynote data, are sent to the CPU via the switch interface 13.
14. The CPU 4 then stores the captured keynote data in the RAM SJI area of the memory 15.

Thereafter, the CPU 14 performs the sound generation process while performing the transpose process with reference to the keynote data stored in the RAM.

That is, the sound production process is performed as follows. First, CPU1
4) It sends information necessary for sound production, ie, key on/off, key number envelope, velocity, tone number, etc., to the sound source circuit 17.

At this time, the CPU 14 refers to the keynote data previously stored in the memory 15 and calculates the frequency to be transposed.
The key number is increased or decreased based on this calculated value, and the increased or decreased key number is transmitted to the sound source circuit B17.

The sound source circuit 17 converts the increased or decreased key number into a frequency number and determines the reading speed from one day of the waveform memory. On the other hand, the sound source circuit 17 determines the reading position of the waveform memory 18 based on the given tone number. Then, the contents of the waveform memory 18 are read from the determined reading position at a speed corresponding to the frequency number.

As a result, a musical tone signal with a transposed pitch is generated, and an envelope and velocity are added to this signal to generate a digital musical tone signal. Then, this digital musical tone signal is converted into an analog musical tone signal by the D/A converter 19, and the sound is emitted by the acoustic circuit 20.

In the above embodiment, the selection switches 2a to 8a are configured to be used only for selecting the keynote, but another mode selection switch may be provided to selectively display contents other than the keynote. In this case, the number of display devices can be reduced depending on the configuration and selection method required for the content, and the device can be configured at a lower cost.

[Effects of the Invention] As described in detail above, according to the present invention, the current keynote position can be recognized on the product regardless of the viewing angle, and the operability is improved so that the desired keynote position can be quickly and accurately adjusted. An excellent transposing device can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram schematically showing the overall configuration of an electronic musical instrument to which the present invention is applied. FIG. 3 explains a conventional transpose device. FIG. 1...Mode transition switch (mode transition means) 2a~
8a...Selection switch (switch means) 2b-8b.
...Indicator (display means). Applicant: Kawai Musical Instruments Manufacturing Co., Ltd.

Claims (2)

[Claims] (1) A mode transition means for instructing to shift to transpose mode, a plurality of switch means provided corresponding to a plurality of keynotes, and a display means provided corresponding to each of the plurality of switch means. and when a transpose mode is instructed by the mode transition means, by pressing the switch means, a display corresponding to the selection is made on the display means, and one keynote is displayed in response to the depression. A transposing device characterized by selecting. (2) When the transpose mode is instructed by the mode transition means, one keynote is selected by pressing one or a combination of two or more of the switch means. Transpose device.