JPH067324B2 - Keystroke speed detector for electronic keyboard instruments - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keystroke speed detection device for an electronic keyboard instrument, and in particular, it enables smooth keystrokes and is in agreement with that of a string striking mechanism of a piano. The present invention relates to a keystroke speed detecting device which can provide a feeling of fingering.

<Prior Art> In a conventional electronic keyboard instrument, as shown in FIG.
A movable piece 2 is vertically provided on the lower surface of the key 1. On the other hand, below the key 1, a pair of upper and lower beam shielding detection means for generating a beam and detecting shielding of the beam is provided. 3, 4, for example, a pair of upper and lower light-transmitting / receiving elements are arranged, and when the key 1 is depressed, the movable piece 2 on the lower surface of the key 1 shields the upper first beam. , The keystroke speed is detected as the time until the lower second beam is shielded, and the volume and the like are determined based on this.

That is, when the first beam is shielded by the movable piece 2, a keystroke speed count command is issued, and when the second beam is shielded, a sounding command is issued, and the keystroke speed count value in this period is calculated. Since it is decided and the volume etc. is decided,
When both the first and second beams are not shielded, the mute command and the keystroke speed counting preparation command are simultaneously issued. That is, the muffling stroke of the key 1 and the keystroke speed counting preparation command stroke are essentially the same.

<Problems to be solved by the invention> However, in consideration of the traditional performance of the string striking mechanism of the piano, the muffling stroke must be set at a depression position of 4 mm (the depression position at the tip of the key (the same applies below)). , It is a problem in terms of fingering.

Therefore, in the above-mentioned prior art, even when the keys are repeatedly struck, the mute stroke, that is, the keystroke speed cannot be prepared unless the key is returned to the depressed position of 4 mm. It is difficult to play quickly because it is not possible to get the feeling of fingering, and in addition, even with repeated hits, a mute command is issued for each hit, so each note is separated with a release, resulting in a musical expression. There was a problem that it was unnatural.

In addition, since the keystroke speed counting is started at the sinking position of 4 mm, the keystroke speed counting stroke is a stroke (7.5 mm to 8.5 mm) that governs the hammer speed in the string striking mechanism of the piano.
There is also a problem that the relationship between the keystroke speed and the volume is also different as a result.

The second is the time chart of the sound power by such conventional technology.
As shown in the figure, it is shown that a release R is included for each shot after an attack A, a decay D, and a sustain S.

<Means for Solving Problems> The present invention addresses problems such as fingering sensation during repeated hits and muting per hit due to structural limitations of the keystroke speed detection device for an electronic keyboard instrument based on the above-mentioned conventional technique. In view of this, when a shutter band is formed on the movable piece on the lower surface of the key, a muffling command is issued when both the first and second beams are not shielded, and when the first beam is shielded and the second beam is not shielded. A keystroke velocity count preparation command is issued, and a keystroke velocity count command is issued when both the first and second beams are shielded, and a sounding command is issued when the first beam is not shielded and the second beam is shielded. Emits
The above problem is solved by determining the keystroke speed count value in response to the keystroke speed count command.

<Operation> In the configuration of the present invention, the shutter strip of the movable piece does not block either the first beam or the second beam at the time of the muffling stroke when the key is depressed and is shallowly depressed (less than 4 mm) in the key release state. When the mute command is issued and the key sinks deeper than the mute stroke, when the key is repeatedly stroked (4 mm to less than 7.5 mm), the shutter band blocks only the first beam and the second beam When the key depression speed counting preparation command is issued without blocking the key, and then the key is depressed more deeply than the continuous stroke return stroke (7.5 mm to less than 8.5 mm)
At the time of the key pressing speed counting stroke of the key, the shutter band blocks both the first and second beams, and the key pressing speed counting command is issued. When the key is depressed further than the key pressing speed counting stroke, the key pressing is completed. When the key stroke ((8.5mm or more) is generated, the shutter belt does not block the first beam,
Only the second beam is shielded, a sounding command is issued, and in response to the keystroke speed count preparation command, the keystroke speed counting means is initialized, and the keystroke speed is counted in response to the keystroke speed count command. In response to a tone generation command, the keystroke speed count value is fixed.

<Embodiment> Next, an embodiment of the present invention will be described below with reference to FIG. 3 and the following drawings. In FIG. 3, an opening window is provided in a movable piece 2 suspended from a key 1. 5 is bored, and a shutter band 6 is formed below it. The vertical width of the shutter strip 6, that is, the dimension from the lower opening edge of the window 5 to the lower end of the movable piece 2 is such that the depression of the tip of the key is within the range of 4 mm to less than 8.5 mm. Is formed so as to shield the. The first beam shield detection means 3 is set so that the movable piece 2 shields the first beam 7 when the key tip is depressed to 4 mm, and the second beam shield detection means 4 is It is set so that the second beam 8 is blocked by the movable piece 2 when the tip of the key is depressed to 7.5 mm.

The operation of the above configuration will be described below with reference to FIGS. 4 and 5.

In the silencing stroke when the key is shallow (less than 4 mm) and depressed (Fig. 4 (A)), neither the first beam 7 nor the second beam 8 is blocked by the shutter band 6, and Deeply (4 mm to less than 7.5 mm) depressed (Fig. 4
(B)) In the continuous stroke returning stroke, the shutter belt 6 is the first
Of the second beam 8 is not blocked. In the keystroke velocity counting stroke in a state where the depression is further deeper (7.5 mm to less than 8.5 mm) (Fig. 4 (C)), both the first beam 7 and the second beam 8 are shielded and deeper than this ( (8.5 mm or more) In the sounding stroke in the depressed state (FIG. 4 (D)), the shutter band 6 passes through the first beam 7, and the first beam 7 is not blocked through the window 5, Only the second beam 8 is blocked.

The operation during repeated keystrokes will be described with reference to FIG. 5. From the state in which only the first beam 7 is passed and the second beam 8 is blocked in the sounding stroke (FIG. 5 (A)). , Fig. 5
As shown in (B), the key is slightly raised (less than 7.5 mm) to be positioned in the continuous stroke returning stroke to shield the first beam 7 and allow the second beam 8 to pass through, and then to FIG. As shown in (C), press the key again (7.5mm ~ less than 8.5mm),
The first beam 7 is positioned at the keystroke speed counting stroke.
Both the second beam 8 and the second beam 8 are blocked by the shutter band 6. Then, by further pressing the key (8.5 mm or more), as a sounding stroke, the first beam 7 is allowed to pass and only the second beam 8 is blocked.

When the shutter strip 6 is formed on the movable piece 2, as shown in FIG.
Is made of a beam permeable material, and a beam opaque material is applied to the lower part of the material to adhere the same to the shutter strip 6
May be For example, when the beam is a light beam, the movable piece 2 may be made of a translucent material, and the opaque material may be applied to the lower portion.

Next, FIG. 7 shows a block diagram of the hardware configuration and the software function realizing means at the same time. The first beam blocking detection means 3 and the second beam blocking detection means 4 are shown. Together with the shutter belt 6,
Mute command means 10 for issuing a mute command by detecting that the beams 7, 8 of the first beam 7 are not shielded, and the first beam shield detection means 3 detect the shield of the first beam 7, and the second beam When the shielding detection means 4 does not detect the shielding of the second beam 8, the keystroke speed count preparation command means 11 for issuing a keystroke speed count preparation command and the first and second beam shield detection means 3, 4 are provided.
Both of which detect the blocking of the first and second beams 7 and 8, issue a keying velocity counting command means 12 for issuing a keying velocity counting command.
When the first beam blocking detection means 3 does not detect the blocking of the first beam 7 and the second beam blocking detection means 4 detects the blocking of the second beam 8, a sounding command is issued. Commanding means 13 and a keying speed counting means for initializing in response to the keying speed preparation command, counting a keying speed in response to a keying speed counting command, and determining a keying speed count value in response to a sounding command. 14 and are combined.

The operation of the above configuration will be described below with reference to the control flowchart of FIG.

In the key pressing speed detection device that has started (Fig. 8a),
It is discriminated whether or not there is a light reception signal in the beam shielding detection means 3 of FIG. 7, that is, whether or not the first beam 7 is shielded (FIG. 8b), and the discrimination result is that there is a light reception signal, that is, When the first beam 7 is not shielded (in this case, it is either the muffling stroke of FIG. 4 (A) or the sounding stroke of FIG. 4 (D)), It is determined whether or not there is a light reception signal, that is, whether or not the second beam 8 is shielded (Fig. 8c), and when the second beam 8 is not shielded (Fig. 4 (A)). State), enter the muffling stroke, clear the tone flag (Fig. 8d),
The tone flag of "0" is transferred to the S / M (musical tone synthesizer) (Fig. 8e), the tone is muted, and the process returns to Fig. 8b.

As a result of the discrimination in the step of FIG. 8b, when the first beam 7 is shielded, similarly, it is determined whether or not there is a light reception signal in the second beam shield detection means 4, that is, the second beam shield detector 4. It is determined whether or not the beam 8 is blocked (Fig. 8f), and the second
When the beam 8 is not blocked (state of FIG. 4 (B)), the continuous stroke returning stroke is started, the counter is cleared (FIG. 8g), the tone flag is set (FIG. 8h),
The gate is cleared (Fig. 8i) and the process returns to Fig. 8b.

As a result of the discrimination in the step of FIG. 8f, when the second beam 8 is also shielded (state of FIG. 4 (C)), it is discriminated whether the gate is “0” or “1” ( 8j), when the gate is "0", the keystroke speed counting stroke is started, the counter is incremented (FIG. 8k), and the process returns to FIG. 8b.

On the other hand, when the shielding of the second beam 8 is detected as a result of the discrimination in the step of FIG. 8C (at this time, it is discriminated that the first beam in the step of FIG. 8b is not shielded). (Fig. 4 (D) state), the sounding stroke is entered, the gate is set (Fig. 8l), and the gate of "1" and the keystroke velocity count value are transferred to S / M (8th stage). (Fig. M), this is sounded, the process returns to Fig. 8b, and the subsequent steps are repeated.

<Effects> As described above, according to the present invention, the shutter band is formed on the movable piece hung vertically on the key, and when the shutter band does not block both the first and second beams, a mute command is issued. , When the key is pressed a little deeper than this mute command stroke, and when only the first beam is shielded, a keystroke velocity count preparation command is issued, and the key is depressed further deeply, and both the first and second beams are shielded. Sometimes when issuing a keystroke velocity counting command, sinking deepest and blocking only the second beam,
By issuing a tone generation command, the keystroke speed counting preparation command is set to an initial state, the keystroke speed is counted by the keystroke speed count command, and the keystroke speed counting means for determining the keystroke speed count value by the sounding command is provided. A continuous stroke return stroke is formed following the mute stroke, and a keystroke velocity counting preparation command is issued at this position.Therefore, without returning the key to the mute stroke position as in the conventional technique, the next continuous stroke return stroke position is restarted. With this, it is possible to perform continuous hits, which facilitates quick performance, and provides an effect similar to the fingering feeling of a piano. Further, since it is not necessary to perform a muffling stroke during continuous hits, as shown in FIG. 9, it is possible to perform continuous hits without being accompanied by a release for each hit, and there is also an effect that there is no unnaturalness in musical expression. Played. .

Furthermore, since the keystroke speed counting is started from the position (7.5 m / m) where the continuous stroke return stroke ends, the subsequent keystroke speed counting stroke is approximated to the stroke that governs the hammer speed in the string striking mechanism of the piano. Because you can
There is also an effect that the fingering feeling of a piano can be obtained when playing.

[Brief description of drawings]

FIGS. 1 and 2 show a conventional example, FIG. 1 is a perspective view, FIG. 2 is a time chart of acoustic power, and FIG. 3 and subsequent figures relate to an embodiment of the present invention, and FIG. 3 is a perspective view. Figure, 4th
Figures (A) to (D) are illustrations of operation during normal key depression, and Figure 5 (A) to
(D) is an operation explanatory view at the time of continuous hitting, FIG. 6 is a perspective view of another embodiment, FIG. 7 is a functional block diagram of the present invention, FIG. 8 is a flow chart, and FIG. 9 is a sound force of the present invention. It is a time chart. DESCRIPTION OF SYMBOLS 1 ... Key, 2 ... Movable piece 3 ... 1st beam shield detection means 4 ... 2nd beam shield detection means 6 ... Shutter band, 7 ... 1st beam 8 ... 2nd beam, 10 ... Mute command means 11 ... keystroke speed count preparation command means 12 ... keystroke speed count command means 13 ... sound generation command means 14 ... keystroke speed count means

Claims (1)

[Claims] 1. A first beam masking detection means 3 having a movable piece 2 which moves in conjunction with a key 1, and a first beam 7 which intersects with the movable piece 2, and which detects the blocking of the beam. A second beam shield that has a second beam 8 that intersects the movable piece at a position that is separated from the first beam in the moving direction when the movable piece is pressed by the key, and that detects the shield of the beam. The detecting means 4 and the movable piece 2 do not block both the first and second beams 7 and 8 by the muffling stroke of the key when the key is shallowly sunk and released from the key. When the key is depressed when the key is depressed deeper than the continuous stroke return stroke, only the first beam 7 is shielded and the second beam 8 is not shielded in the continuous stroke return stroke of the key that is deeply depressed. Both the first and second beams 7 and 8 are shielded by the key-stroke speed counting stroke, and the key is the key-stroke speed. A shutter band 6 that does not block the first beam 7 and blocks only the second beam 8 at the sounding stroke of the key when the key depression is completed, which is depressed more deeply than several strokes, and the first and second shutter bands. When neither the beam blocking detection means 3 nor 4 detects the blocking of the first and second beams 7 and 8, the muffling commanding means 10 which issues a muffling command, and the first beam blocking detection means 3 are the first beams. 7 is detected, and the second beam shield detection means 4 detects the second beam 8
Of the first and second beams 7 and 8, the keystroke velocity count preparation command means 11 for issuing a keystroke velocity count preparation command and the first and second beam shield detection means 3 and 4 both When the blocking is detected, the keying velocity counting command means 12 which issues a keying velocity counting command, the first beam blocking detection means 3 does not detect the blocking of the first beam 7, and the second beam blocking detection means 4 When the blockage of the second beam 8 is detected, in response to the tone generation command means 13 for issuing a tone generation command and the keystroke velocity count preparation command, the initial state is reached, and in response to the keystroke velocity count command, the keystroke velocity is changed. A keystroke speed detecting device in an electronic keyboard instrument, comprising: a keystroke speed counting means (14) for counting and fixing a keystroke speed count value in response to a sounding command.