JPH02149896A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To give slur effect to a generated musical tone by providing a means which varies a musical tone state gradually from a pre-slur sound to a post-slur sound for slur performance according to a straight line or curved line determined corresponding to operation intensity. CONSTITUTION:In the slur performance, the straight or curved line is selected corresponding to the operation intensity of a keyboard key and the musical tone state (pitch, sound volume, etc.) in the slur is varied according to the straight or curved line. In this case, an initial touch detecting circuit 4 is a circuit for detecting the intensity of key depression in the biginning of the operation of an operated key and the time from the depression of a 1st key switch provided to the operated key to the depression of a 2nd key switch is measured and outputted as touch data to a slur effect circuit 9. When the slur start signal SS is supplied, the slur effect circuit 9 outputs a key code KC which varies gradually from the pre-slur sound to the post-slur sound. Consequently, the slur effect is given.

Description

[Detailed description of the invention]

"Industrial Application Field" The present invention relates to an electronic musical instrument capable of imparting a slur (voltamento) effect to generated musical tones. ``Prior art'' A slur is a playing method in which when changing the pitch from one note to the next, the pitch is not directly changed to the next note, but the pitch is changed smoothly and the transition is made to the next note. . In recent years, electronic musical instruments that can automatically add this slur effect have been developed (see Japanese Patent Publication No. 63-4191). This electronic musical instrument is designed so that when a legato performance operation (a key operation in which a second keyboard key is operated before the first keyboard key is released) is performed while the slur switch is turned on, the slur switch is turned on. A slur effect is automatically applied that changes the pitch smoothly from the sound of the first keyboard key to the sound of the second keyboard key. [Problems to be Solved by the Invention] Incidentally, the slur effect imparted in conventional electronic musical instruments of this type usually only changes the pitch linearly, and in some cases the pitch changes along an exponential curve. Although some curves change, this electronic musical instrument only had one type of curve. SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic musical instrument that can change a slur curve (a curve of changes in pitch, volume, etc. during slur performance) in accordance with the operating strength of a keyboard key. ``Means for Solving the Problems'' The present invention provides a keyboard, a slur detection means for detecting when a slur performance is performed on the keyboard, and an operation intensity for detecting the operation intensity of a key operated on the keyboard. a detecting means, and when the slur detecting means detects a slur performance, sequentially detecting musical sound states from a pre-slur sound to a confirmed slur sound along a straight line or a curve determined in accordance with the operation strength detected by the operation strength detecting means. and means for changing. "Operation" According to the present invention, when playing a slur, a straight line or a curved line is selected according to the operating strength of the keyboard key, and the musical tone state (pitch, volume, etc.) when playing the slur is adjusted along this straight line or curve.
change. Thereby, it is possible to change the state of change of musical tones during slur performance in accordance with the operating strength of the keys. "Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

【overall structure】

FIG. 1 is a block diagram showing the overall configuration of an electronic musical instrument according to an embodiment of the present invention. In this figure, reference numeral 1 is a keyboard having a plurality of keys, and below each key there is a first key for detecting key operation. A second key switch is provided. Here, the first key switch is turned on when the key is slightly depressed, and the second key switch is turned on when the key reaches approximately the lower limit position. 2 is a key press detection circuit, which sequentially scans the output of each key switch on keyboard 1 every time a certain period of time elapses to check the on/off status of each key, and when it detects a key that is turned on, Key-on signal KON
is "l" and the narrow key-on pulse KON
P and also outputs the key code KC of the detected key. Further, when the key is turned off, the key-on signal KON is returned to "0". In addition, this key press detection circuit 2
is provided with a slur detection circuit 3 that detects a key press operation (hereinafter referred to as a slur operation) to which a slur effect should be applied. When the slur detection circuit 3 detects a slur operation, it outputs a slur start signal SS (pulse signal). The initial touch detection circuit 4 is a circuit that detects the initial key press strength (initial touch) of the operated key, and detects the initial key press strength (initial touch) of the operated key. The time until it is turned on is measured, and the measurement result is output as touch data TD. The tone color selection operator 5 is a tone color setting operator provided on the operation panel. The timbre detection circuit 6 scans the output of each timbre selection operator 5 every time a predetermined period of time elapses, detects the currently set timbre, and outputs a timbre code NC indicating the timbre. The slur effect circuit 9 is a circuit that applies a slur effect to a generated musical tone, and when supplied with a slur start signal SS, outputs a key code KC that sequentially changes from a pre-slur tone to a slur detection tone. Furthermore, if the slur start signal SS is not supplied, the key code KC output from the key press detection circuit 2 is output as is. The tone generator IO forms digital musical tone data GD having the pitch of the key code KC output from the slur effect circuit 9 and the tone indicated by the tone code NC output from the tone detection circuit 6, and sends it to the multiplier 11. Output. The envelope generating circuit 12 generates digital envelope data ED that changes sequentially with a wave color determined according to the tone color code NC in synchronization with the key-on signal KON, and outputs it to the multiplier 11. Multiplier 11 multiplies musical tone data CD and envelope data ED, and outputs the multiplication result to D/A converter 13. The D/A converter 13 converts the output of the multiplier 11 into an analog musical tone signal and outputs it to the sound system 14. The sound system 14 is composed of an amplifier, a speaker, etc., and generates a musical tone signal outputted from the D/A converter 13 as a musical tone. Next, each part of the above-mentioned electronic musical instrument will be explained in detail.

[Slur detection circuit 3] As shown in FIG. 2, in this electronic musical instrument, if the second key is pressed before the first key is released (△t≧ 0), it is determined that it is a slur operation, and a slur start signal SS shown in the figure is output. Note that the overlap time Δt between the first key press and the second key press is O
It may be determined that it is a slur operation only when ≦△t≦Tx (where Tx is a certain period of time). In addition, a slur indication switch is provided separately, and when this switch is operated, a sound whose envelope has not yet become O is searched for after the first key-on, and when detected, a slur start signal SS is output. You can. In this case, a slur effect is applied from the detected sound to the first key-on sound. Also, 1st. Detects the overlap of the second pressed key, and
The slur start signal SS may be output based on the key press (when the envelope is not O).Furthermore, the above-mentioned overlap time Δt satisfies 0≦△t≦Tx, and The slur start signal SS may be output when the envelope is not at O.

[Envelope Generation Circuit 12] FIG. 3 is a block diagram showing the configuration of the envelope generation circuit 12, and in this figure, 18 is an envelope data generation section. This envelope data generation section 18 is
In response to the key-on signal KON (see FIG. 4 (a)) output from the key press detection circuit 2, envelope data EDa that changes in the waveform shown in FIG. 4 (b), for example, is generated, and at the timing of clock pulse φe. Output sequentially. In this envelope waveform, AT is a rising part, ST is a sustaining part, and DC is a damping part. This envelope waveform differs for each tone, and the peak value of the rising portion AT and the peak value of the sustaining portion ST are each determined according to the touch data TD. Further, when the slur start signal SS is supplied, the envelope data generation circuit 18 changes the envelope waveform according to an envelope waveform that is a linear connection of the envelope waveform based on the first key press and the envelope waveform based on the second key press. Envelope data EDa is generated and output at the timing of clock pulse φe. In other words, now the fifth
Figures (a) and (b) are shown in Figure 1. If the timing is the second key depression, the slur start signal SS is generated immediately after the second key depression, as shown in FIG. Then, the slur timing at which the slur effect is applied becomes the timing shown in (d) in the same figure, and the waveform of the envelope data EDa becomes the timing shown in (d) in the same figure.
The waveform shown in e) is obtained. Here, as is clear from the same figure (e), when the slur start signal SS is supplied,
The sustained part ST of the envelope waveform based on the first key press and the sustained part ST of the envelope waveform based on the second key press are connected by a straight line. Dl the level of the sustaining part of 1
, the level of the second sustaining part is D2, and (D2-D I)/S DN-d (1), after the slur start signal SS, the envelope data EDa is Di, DI+d, D1+2d. . . . , DI+(SDN-1)d, D2 (see the broken line in FIG. 5(e)). Note that, as explained below, the number of data S D N is determined by the read control circuit 19.
Supplied from. Second, the slur envelope memory 20 is a memory in which n envelope waveforms (see FIG. 6) used in the slur timing described above are stored. In other words, when playing slurs, this electronic musical instrument does not simply use the broken line part of the envelope waveform shown in Figure 5 (e), but instead inserts envelope waveforms of various shapes shown in Figure 6 into this broken line part. In this case, which waveform is used is determined according to the tone code NC and the touch data TD.In addition, each waveform is stored by data indicating the displacement from the O level. Therefore, when the slur envelope waveform read out from the slur envelope memory 20 (see Fig. 5 (vi)) is added to the broken line part in Fig. 5 (e), the result as shown in Fig. 5 (g) is obtained. Then, the envelope waveform at the slur timing changes according to the waveform read from the memory 20. The read control circuit 19 is a circuit that reads the envelope waveform in the slur envelope memory 20, and includes a seventh
A waveform number table 22 shown in the figure and a start address table 23 shown in FIG. 8 are provided. The waveform number table 22 is a table in which slur envelope waveform numbers determined according to the upper 6 bits of the timbre code NC and touch data TD are stored in advance, and the timbre code NC and the upper 6 bits of the touch data TD are used as address data. When supplied, the corresponding slur envelope waveform number is read. The start address table 23 is a table in which the start address of the storage area of the memory 20 in which each slur envelope waveform is stored and the number of data SDN constituting the envelope waveform are stored, and when the envelope waveform number is supplied as address data, , the corresponding start address and data SDN are read out. Therefore, the read control circuit 19 always outputs "0". When the slur start signal SS is supplied, the tone code NC supplied from the tone detection circuit 6 and the touch data TD supplied from the initial touch detection circuit 4 at that time are supplied to the waveform number table 22. The slur envelope waveform number is read, the read waveform number is supplied to the head address table 23, and the head address and data SDN are read. and,
The data SDN is output to the envelope data generating section 18. Thereafter, the successive output control circuit 19 sequentially reads slur envelope data from the slur envelope memory 20 based on the first address read from the table 23, and performs addition 1821 at the timing of the clock pulse φe.
Output sequentially to The adder 21 adds the envelope data EDa output from the envelope data generator 18 and the output data of the read control circuit 19, and outputs the addition result as envelope data ED. That is, this adder 21 is
Normally, the data EDa is output as the envelope data ED, and when the slur start signal SS is generated, the data EDa and the slur envelope data output from the read control circuit 19 are added. ), and outputs the addition result as envelope data ED (see FIG. 5(G)). Note that the envelope generating circuit 12 described above stores various envelope waveforms in the slur envelope memory 20 and changes the envelope during slur performance based on this waveform. The envelope data may be calculated by preparing different arithmetic expressions and selecting these arithmetic expressions based on the touch data TD. [Slur Effect Circuit 9] FIG. 9 is a diagram showing the configuration of the slur effect circuit 9. This is a diagram. In the slur effect circuit 9 shown in this figure, the key code KC output from the key press detection circuit 2 shown in FIG. The signal is outputted to the tone generator 10 of FIG. 1 via the hold circuit 32 in the state. On the other hand, when the slur start signal SS is supplied, the curve stored in the slur curve memory 33 is read out, and a key code KC that changes sequentially according to the change curve of the read curve is created. The key codes KC are sequentially outputted via the hold circuit 32. The details will be explained below. (A) Structure First, FIG. 10 is a diagram showing the above-mentioned slur curve memory 33, in which m different slur curves are stored. Each slur curve is
As shown in FIG. 11(a), the first data Ds is rO
J, the last data De is rN, and the data D in between
All x is data satisfying 0≦DX≦1. Further, the number of data pieces CN differs for each curve. Then, each piece of data is sequentially read out in the order of DB-+DB. Reference numeral 34 in FIG. 9 is a memory readout circuit for reading data in the slur curve memory 33, and is composed of a slur curve selection circuit 35, an address generation circuit 36, and an adder 37. The slur curve selection circuit 35 is internally provided with a waveform number table 40 shown in FIG. 12 and a leading address table 41 shown in FIG. 13. The waveform number table 40 is a table in which slur curve numbers determined according to the tone code NC and the upper 6 bits of the touch data TD are stored in advance.
When C and the upper 6 bits of touch data TD are supplied as address data, the corresponding slur curve number is read out. The start address table 41 contains the start address of the storage area of the memory 33 where each slur curve is stored and the number of data CN making up the slur curve.
is a table in which are stored, and when a slur curve number is supplied as address data, the corresponding start address and data CN are read out. When the slur curve selection circuit 3FF is supplied with the slur start signal SS, the slur curve selection circuit 3FF selects the timbre code NC supplied from the timbre detection circuit 6 and the touch data TD supplied from the initial touch detection circuit 4 at that time.
is supplied to the waveform number table 40 to read the slur curve number, and the read number is sent to the start address table 41.
The first address and data CN are read out. Then, the first address is outputted to the adder 37 as address data SAD, and data CN is outputted to the address generation circuit 36. The address generation circuit 36 is a circuit that generates address data PAD that increases sequentially as 0, 1.2, . Based on this address data PAD, it is sequentially read out from the memory 33. This address data generation circuit 36 is configured to include an address counter, a gate circuit, a comparison circuit, and the like. Then, the control circuit 39 sends the memory read signal MRD (“1
When the ``signal'' is supplied, the address counter is reset at the rising edge of the address counter. After that, the address counter counts the slur clock φS, and the count output is sequentially output to the adder 37 as address data PDA. When the count output of the address counter matches the data CN output from the slur curve selection circuit 35, a slur end signal SE is output to the load control circuit 39.Control circuit 39
receives this slur end signal SE and returns the memory read signal MRD to 0". This causes the address counter to stop counting. The adder 37 receives the start address SAD output from the slur curve selection circuit 35, The address data PAD output from the address generation circuit 36 is added, and the addition result is output as address data AD to the slur curve memory 33. This address data AD causes the data in the slur curve memory 33 to be sequentially read out. , interpolation circuit 4
4. The interpolation circuit 44 is a circuit that performs, for example, linear interpolation between each data output from the slur curve memory 33, and the data interpolated by the interpolation circuit 44 is sequentially output to the multiplier 45. The multiplier 45 multiplies the output data of the interpolation circuit 44 and the output data of the subtracter 46, and outputs the multiplication result to the adder 47. Adder 4
7 adds the output data of the multiplier 45 and the output data of the latch 48, and outputs the addition result to the selector 31. The selector 31 selects and outputs the output of the adder 47 when the select signal SEL output from the control circuit 39 is "1", and selects and outputs the output of the latch 30 when the select signal SEL is "0". Further, the hold circuit 32 is configured so that the hold signal HLD is “
When it is "O", it enters a through state, and when it rises to "L", it stores and holds the input data. The control circuit 39 is a circuit that generates control signals for controlling each of the above-mentioned parts, and receives the key-on signal KON, key-on pulse KoNP, and slur start signal SS output from the key press detection circuit 2 shown in FIG. A signal HLD1, a memory read signal MRD, and a select signal SEL are generated and output to each section. FIG. 14 shows the timing of each of the above signals. (B) Operation Next, the operation of the slur effect circuit 9 described above will be explained. (B-1) When the slur start signal SS is not supplied In this case, the control circuit 39
“0” is output as L to the selector 31. As a result, the output of the latch 30 is selected by the selector 31. In this state, the key-on signal KON rises, and at this rising point, the key-on pulse KON
When ONP is supplied, the control circuit 39 outputs the key-on pulse KONP to the latch 30, and
The hold signal HLD (“1” signal) is sent to the hold circuit 32.
Output to. Note that the pulse width of the hold signal HLD is approximately twice that of the key-on pulse KONP. When the key-on pulse KONP is supplied to the latch 30, the key code KC is read into the launch 30 and supplied to the hold circuit 32 via the selector 31. Then, when the hold signal HLD returns to "0", the hold circuit 32 enters the through state, and (5). The key code KC output from Chi 30 is Tonji J. The signal is output to the generator 10 (FIG. 1). (B-2) When slur start signal SS is supplied The operation in this case will be explained with reference to FIG. In the following explanation, the key code KC output from the key press detection circuit 2 based on the first key press will be referred to as the first key code KCl, and the key code based on the second key press will be referred to as the second key code. It's called KC2. First, a key-on pulse KONP (symbol Pi in FIG. 14 (d)) is supplied to the control circuit 39 based on the second key depression, and at the same time, a slur start signal SS (
When the key-on pulse KONP is supplied, the control circuit 39 first applies the key-on pulse KONP to the latches 30 and 4.
At the same time, the hold signal HLD ((e) in the same figure) is output to
) is output to the hold circuit 32. key on pulse KO
When NP is supplied to the latch 48, the first key code KC1 that was being supplied to the input terminal of the latch 48 at this point is
is read into the latch 48, and when the key-on pulse KONP is supplied to the latch 30, the second key code K
C2 is loaded into latch 30. Therefore, when the hold signal HLD (“l”) is supplied to the hold circuit 32,
The first key code KC1 is held in the hold circuit 32. Next, the control circuit 39 sends a slur start signal SS
At the falling edge of , a select signal (1" signal) is output to the selector 31. As a result, from now on, the selector 3
1 selects the output of adder 47. Next, the control circuit 39 sets the hold signal 1 (LD to “0”).
At the same time, the memory read signal MRD (“l
"signal) ((g) in the same figure) is output to the address generation circuit 36. When the hold signal HLD becomes "0'", the hold circuit 32 enters the through state, and from then on, the output of the adder 47 is output to the selector 31 and the hold signal. It is output to the tone generator 10 via the circuit 32. On the other hand, when the memory read signal MRD is supplied to the address generation circuit 36, address data AD is sequentially outputted from the adder 37.
It is supplied to the slur curve memory 33. As a result, the slur curve data SCD corresponding to the tone hood NC and the touch data TD based on the second key depression are sequentially output from the slur curve memory 33, and are supplied to the interpolation circuit 44. Curve data 5CDa is sequentially output to the multiplier 45. The multiplier 45 outputs the output data of the subtracter 46, that is, (
KO2-KCI) is multiplied by the slur curve data 5CDa, and the result is output to the adder 47. The adder 47 adds the output data of the multiplier 45 and the first key code KC1 output from the latch 48, and outputs the addition result KC1+(KC2-KC1)·5CDa. Here, the data 5CDa is O≦5CDa≦1, and therefore, KCI≦KC1+(KC2−K
C1)・5CDa≦KC2 holds true. As a result, if the data 5CDa changes according to the waveform shown in FIG. 11(a), for example, KCI<
In the case of KC2, the output data of the adder 47 is changed from KCI to K.
It changes according to the waveform up to C2, while KCI>KC
In the case of 2, the output data of the adder 47 is the waveform shown in FIG. 11 (b), which is obtained by inverting the waveform of FIG.
It changes according to the waveform of The output data of the adder 47 is then supplied to the tone generator 10 via the selector 31 and hold circuit 32. As a result, in the tone generator 10, musical tone data CD whose pitch changes according to the slur curve in the slur curve memory 33 is formed, and this musical tone data COD is converted into an envelope output from the envelope generating circuit 12 described above in the multiplier 11. The signal is multiplied by the data ED, and the result of this multiplication is converted into an analog signal by the D/A converter 13, and then produced by the sound system 14 as a musical tone with a slur effect. The above is the slur effect applying operation of the slur effect circuit 9 shown in FIG. 9 during normal performance. (C) Operation when there is a special key operation - If the player performs a slur operation again during slur automatic performance Figure 15 is a timing chart of each signal of the slur effect circuit 9 in this case. . In (c) of this figure, the slur start signal SS indicated by the symbol P2 is the slur start signal SS based on the first slur operation, and the memory is read at the falling edge of the hold signal HLD that occurs at the same timing as this slur start signal SS. Signal MRD rises and slur automatic performance is performed. If the player performs a slur operation again before this memory read signal rises (during slur automatic performance), the slur start signal SS indicated by reference numeral P3 in FIG. is supplied to the control circuit 39 of. control circuit 39
receives the slur start signal SS, performs the same processing as described above, that is, outputs the key-on pulse KONP to the latch 30.48 and the hold signal HLD to the hold circuit 32, and then performs the memory read operation. The signal MRD is set to "0". Only the process of setting the memory read signal MRD to "0" differs from normal slur processing. Thereafter, the control circuit 39 sets the select signal SEL to "bit" (already set to "1" in this case), and then sets the memory read signal MRD to "1", as in the case described above. Thereafter, reading from the slur curve memory 33 is performed in exactly the same manner as in the case described above, and when the slur end signal SE is output from the address generation circuit 36, the slur processing is completed. (2) When the second pressed key is released during slur automatic performance FIG. 16 is a timing chart of each signal of the slur effect circuit 9 in this case. Time L shown in (a) of this figure
Even if the second pressed key is released at step 1, there is no change in each signal, as shown in (e) to (g) of the figure. In this case, as the key-on signal KON becomes "o", the envelope is successively attenuated, but the pitch of the slur continues to be played. (2) In the above case, if the key is pressed again immediately after that, FIG. 17 is a timing chart in this case. After the second pressed key is released at time tl, when the third key is pressed at time L2 before the slur end signal SE is generated, a key-on pulse KONP is supplied to the control circuit 39, and this key-on pulse is supplied to the control circuit 39. At the rising edge of the pulse KONP, the select signal SEL is returned to "0'° (FIG. 17 (E)). As a result, the selection state of the selector 31 is switched. In this case,
Since the slur start signal SS is not generated, from now on,
A musical tone (unrelated to normal Kusura performance) is generated. As is clear from FIGS. 17(F) and (G), even after the selector 31 is switched, the memory read signal MRD is continuously output, and therefore the address counter in the address generation circuit 36 is Counting continues until the slur end signal SE is generated. (D) Other configuration examples Next, other configuration examples of the above-mentioned slur effect circuit 9 will be explained. FIG. 18 is a block diagram showing the same configuration example, and in this figure, the same components as those in FIG. 9 are given the same reference numerals, and their explanations will be omitted. The circuit shown in this figure differs from the circuit shown in FIG. 9 in the data in the slur curve memory 51. That is, the data in the slur curve memory 33 in FIG. 9 is data that changes from 0 to 1, as shown in FIG. 11(a). On the other hand, the data in the slur curve memory 51 in FIG.
As shown in FIG. 19, the data changes toward l+O. In this case, data Ds=1 is read first, then data 0≦Dx≦1 is sequentially read, and finally data De-〇 is read out. Next, the circuit of FIG. 18 differs from the circuit of FIG. 9 in the processing of data read out from the interpolation circuit 44. That is, in the circuit of FIG. 18, in the subtracter 52,
The key food KC2 output from the latch 30 is subtracted from the key food KCI output from the latch 48, and this subtraction result is multiplied by the slur curve data 5CDa output from the interpolation circuit 44, and the multiplication result, that is, (KC1-KC2)·5CDa is supplied to the adder 54 via the gate circuit 53. Here, the signal GS for controlling the opening and closing of the gate circuit 53 is the ninth
“1” at the same timing as the select signal SEL in the figure
When this signal GS is "1", the gate circuit 53 is in an open state. The adder 54 performs the calculation (KCI-KC2)·5CDa+KC2. Then, this calculation result is passed through the hold circuit 32,
It is output as key code KC3. According to the above configuration, when KCI>KC2, the waveform in the slur curve memory 51 (see FIG. 19)
An automatic slur performance is performed in which the pitch changes according to , and if KCI<KC2, the slur curve memory 51
An automatic slur performance is performed in which the pitch changes according to a waveform inverted from ro and 5J as a reference. Note that in the above embodiment, the slur curve memory 33 or 51
The pitch of the slur is changed according to the data in the data, but instead of this, an arithmetic expression may be selected based on the evening/nochi data TD, and the pitch may be changed by calculation based on the selected arithmetic expression. . "Effects of the Invention" As explained above, according to the present invention, there is an effect that the change curve (slur curve) of pitch, volume, etc. during slur performance can be changed depending on the operating strength of the keyboard keys. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 2 is a timing diagram for explaining slur detection, FIG. 3 is a block diagram showing the configuration of the envelope generation circuit 12 in the same embodiment, and FIG. 4 is an envelope data ED diagram.
FIG. 5 is a timing diagram for explaining the operation of the envelope generation circuit 12 shown in FIG. 7 and 8 are diagrams showing a waveform number table 22 and a start address table 23 provided in the readout control circuit 19 of the envelope generation circuit 12, respectively, and FIG. 9 is a diagram showing the slur effect in the same embodiment. A block diagram showing the configuration of the circuit 9,
FIG. 10 is a diagram showing the stored contents of the slur curve memory 33 in the slur effect circuit 9, FIG. FIG. 12 is a diagram showing a waveform inverted based on . 13 is a diagram showing a waveform number table 40 and a start address table 41 provided in the slur force selection circuit 35 of the slur effect circuit 9, and FIG. 14 is a diagram for explaining the operation of the slur effect circuit 9. Timing diagram, 1st
5 to 17 are timing diagrams for explaining the operation of the slur effect circuit 9 when a special key operation is performed, and FIG. 18 is a block diagram showing another example of the structure of the slur effect circuit 9. FIG. 19 is a diagram showing an example of a slur curve stored in the slur curve memory 51 in FIG. 18. 1...Keyboard, 3...Slur detection circuit,
4...Initial touch detection circuit, 9...
...Slur effect circuit, 12...Envelope generation circuit.

Claims (1)

[Scope of Claims] A keyboard, a slur detection means for detecting when a slur performance is performed on the keyboard, an operation intensity detection means for detecting the operation intensity of a key operated on the keyboard, and the slur detection. means for sequentially changing the musical tone state from a pre-slur sound to a post-slur sound along a straight line or a curved line determined in accordance with the operation intensity detected by the operation intensity detection means when the means detects a slur performance; An electronic musical instrument equipped with