JPH067332B2 - Automatic rhythm playing device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an automatic rhythm playing device provided with a keyboard capable of detecting a key depression speed or a key depression pressure.

[Prior Art] In recent years, an automatic rhythm playing device has been proposed which executes a rhythm performance based on a different type of fill-in rhythm pattern for each predetermined period in place of a rims performance based on a normal rhythm pattern in order to change the automatic rhythm performance. Has been done.

[Problems of Prior Art] In the above-mentioned conventional example, since the fill-in rhythm is automatically inserted regardless of the performance content of the musical composition, the fill-in rhythm cannot be put in the place where it should be, or the place where it is not good to enter There is a problem that it may not match the contents of the song when entering.

Therefore, in order to put the fill-in rhythm in the place intended by the performer, the level of change in the performance state of the performer, such as the key pressing speed or the key pressing pressure, is detected, and when this level exceeds a certain level, the rhythm is detected. It is possible to switch patterns. In this way, the rhythm pattern can be changed by the player consciously playing with the key pressing speed or key pressing pressure increased, and the pattern can be changed at will.

However, the degree of change of the playing state such as the key pressing speed or the key pressing pressure varies depending on the player and the musical composition, and it is difficult for a beginner to perform the music while always keeping it correct and constant. As a result, it was not possible to change the rhythm pattern just by changing the rhythm pattern depending on whether or not the detection level exceeded a certain value.

[Object of the Invention] It is an object of the present invention to provide an automatic rhythm playing device capable of changing a rhythm pattern extremely naturally regardless of a playing state and a musical idea of a performer.

[Points of the Invention] The level of change in the performance state of the performer is detected, and when the detection level exceeds a predetermined level, the rhythm pattern is changed, and the predetermined level reflects the previous detection level. It is characterized in that the level value for changing the rhythm pattern is made variable according to the playing state by setting the level value obtained by executing a predetermined calculation.

Embodiments Embodiments will be described below with reference to FIGS. 1 to 3. In FIG. 1, the keyboard 1 has a pitch of C _{2 to} C ₇ of 61.
In addition to having individual keys, the output of each key is sent to a musical tone creating circuit (not shown) to produce a musical tone signal, and the speed detector 2
The key depression speed is detected and the detection signal is given to the abnormal value detector 3.

The abnormal value detector 3 judges whether or not the inputted key pressing speed value is larger than a predetermined set value, and outputs the detection signal PC to the output terminal P.
It is output from C and applied to the address input terminal A ₅ of the rhythm pattern memory 6. Further, the carry signal of the tempo counter 5 is given to the input terminal TP as the bar clock VCK to perform a counting operation for a predetermined period (two bars in this embodiment), and the detection signal PC is released.

Tempo counter 5 counts the tempo clock, the count output is supplied to the address input terminal A ₄ to A ₀ of the rhythm pattern memory 6 and outputted from the output terminal C ₄ -C _0. The rhythm pattern memory 6 is preset with a plurality of rhythm pattern data, and its address input terminals A ₆ , A ₇ , and A ₈ output the rhythm pattern selector 4 for selecting a rhythm type such as lock or waltz. Is being supplied. As a result, the rhythm pattern memory 6 reads out the rhythm pattern data corresponding to the signal input from the address input terminals A _{4 to} A _{0 from} the output terminals O _{7 to} O _{0 for} each output of the tempo clock and supplies it to the rhythm tone generator circuit 7. To be done. The rhythm sound source circuit 7 has eight kinds of rhythm sound sources such as a bass drum and a cymbal, and is driven by the corresponding bit data of the rhythm pattern data to output a rhythm sound source signal, which is output to an amplifier and a speaker (not shown). Sound is emitted as an automatic rhythm sound via.

FIG. 2 shows a specific circuit of the abnormal value detector 3. In the figure, reference numeral 8 is a comparator, and the key pressing speed value is inputted to its input terminals A _{3 to} A ₀ as 4-bit data. This key pressing speed value is also input to one of the input terminals X _{0 to} X ₃ of the calculator 12. The data from the latch 14 is fed back and input to the other input terminals Y _{0 to} Y ₃ of the arithmetic unit 12. Thus to calculator 12, respectively input signals _{X 0 ~X 3, Y 0 ~Y} 3,
When X and Y, the next calculation result Z from the output terminals Z _{0 to} Z ₃
Perform an operation to output.

Z = 0.1X + 0.9Y That is, the calculation result Z is an average of the current key pressing speed value X and the value Y up to the previous time, and the output terminals Z _{0 to} Z ₃
Then, it is given to the latch 14 as an output as a new average value. The latch 14 latches the operation result Z by a signal WR = "1" output from a CPU (central processing unit, not shown) when a key is pressed, and supplies it to the input terminals Y _{0 to} Y ₃ and also a multiplier 13 Give to. The multiplier 13 outputs the data αZ obtained by multiplying the calculation result by α and outputs the data αZ to the input terminals B _{0 to} B _{3 of the} comparator 8.
To the key depression speed value this time.

Then, as a result, the signal ABS (“1” signal when A ≧ B) is supplied to the set input terminal S of the SR flip-flop 9 and the input terminal LD of the load counter 10, respectively.

The set output of the flip-flop 9 becomes the detection signal PC, which is created in the rhythm pattern memory 6 and also given to the AND gate 11 as a gate control signal. The clock VCK is input to the AND gate 11, and its output is added to the clock input terminal CK of the load counter 10 and counted. The key pressing speed value via the decoder 15 is input to the input terminals L _{3 to} L ₀ of the load counter 10. When the value is larger than the data β, the data “2” is output, when the value is between β and αZ, the data “1” is output, and the input terminal L _{3 of the} load counter 10 is output.
~ L ₀ . The data "2" and "1" respectively designate the maximum two bars or one bar of the rhythm pattern change period, which is taken in when the result signal ABS is output as "1". Bar clock VC in pairs
A down-count operation is performed for each output of K, and when the count value becomes "0", one signal is output from the output terminal Br and supplied to the reset input terminal R of the flip-flop 9.

Next, the operation of the above embodiment will be described with reference to the time chart of FIG. Before starting the automatic rhythm performance, the rhythm pattern selector 4 first specifies a lock rhythm, for example, and the specified data is given to the address input terminals A _{8 to} A ₆ of the rhythm pattern memory 6.

Next, the rhythm start button is turned on, and the key operation of the keyboard 1 is started in synchronization with this rhythm start. When the rhythm start operation is started, the tempo clock starts to be output and given to the tempo counter 5 for counting. The count output is the address input terminal A ₄ of the rhythm pattern memory 6.
To A ₀ . The type detection signal PC of the normal "0" to the address input terminal A _5, therefore from the rhythm pattern memory 6, the normal rhythm pattern data of the designated rhythm is repeatedly read out at 1 bar unit, the output terminal O ₈
Each rhythm sound source of the rhythm sound source circuit 7 is driven via O ₀ . Therefore, the rhythm sound is emitted from the speaker.

On the other hand, the key output of the keyboard 1 is detected by the speed detector 2 at the key pressing speed. And the key pressing speed value is the abnormal value detector 3
Input terminals A _{3 to} A ₀ of the comparator 8, input terminals X _{0 to} X _{3 of} the calculator 12, and a decoder 15 are provided to the input terminals A _{3 to} A ₀ , respectively. Then, the previous operation result Z from the latch 14 is fed back to the input terminals Y _{0 to} Y ₃ of the operator 12, so that the operation for obtaining the value according to the above equation is executed. As a result, as shown in FIG. 5, when the key pressing speed value is smaller than the key pressing speed value of the previous operation key like the second key, the third key, and the fourth key,
The calculation result Z becomes smaller than the previous one, is multiplied by α, and is given to the input terminals B _{0 to} B ₃ of the comparator 8. And first to
When the current key pressing speed value is smaller than the value Z times α as in the case of the 4th key, the signal ABS is “0” due to A <B.
Therefore, the flip-flop 9 remains reset, and the load counter 10 outputs the decoded output of the decoder 15.
That is, in the case of the first key to the fourth key, "1" is not captured.

Further, as in the case of the fifth key, when the current key pressing speed value is smaller than the previous key pressing speed value, the calculation result Z naturally becomes smaller. Then, like the sixth key, when the key pressing speed value exceeds a value αZ obtained by multiplying the calculation result Z at that time by α,
The signal ABS from the comparator 8 becomes A> B and is output as "1" and is set by the flip-flop 9, and in this case, the key pressing speed value of the sixth key is smaller than β, so the decoder 1
Data “1” is output to 5 and is loaded into the load counter 10.

Therefore, the set output of the flip-flop 9 (detection signal P
C) becomes "1" and is given to the address input terminal A ₅ of the rhythm pattern memory 6, and the AND gate 11 is opened. Therefore, thereafter, until the signal PC becomes "0", the fill-in rhythm pattern data is read from the rhythm pattern memory 6 in place of the normal rhythm pattern data so far, and the automatic performance is performed. Become.

Next, when the key pressing speed value of the seventh key is at a high level exceeding β, the signal ABS is output as "1". Since the decoder 15 outputs the data "2" at this time,
This data “2” is taken into the load counter 10,
The sounding period of fill-in rhythm is extended. Also the 8th
When the key pressing speed values of the key and the ninth key also exceed β and the previous value, the signal ABS is output as "1", and the load counter 10 fetches the data "2" again.
After that, the key pressing speed is low in the 10th to 17th keys, and when the bar clock VCK is output, the load counter 1
0 is counted down and the value is from "2" to "1",
It changes to "0" and becomes "0".

Therefore, the signal Br becomes "1" and the flip-flop 9
Is reset and the signal PC becomes "0" and is applied to the address input terminal A ₅ and the AND gate 11 of the rhythm pattern memory 6. Therefore, the normal rhythm pattern data is read from the memory 6 instead of the rhythm pattern data of the fill-in rhythm that has continued for two measures until then, and the normal rhythm is automatically played. Further, the AND gate 11 is opened, and the down count operation of the load counter 10 is prohibited.

Then, since the key pressing speed of the 18th key thereafter is between β and αZ, “1” is loaded into the load counter 10. As a result, the play of the fill-in pattern is performed again from the normal pattern, but the bar clock VCK is output before the subsequent key pressing speed value becomes αZ or more,
The value of the load counter 10 becomes “0”. Therefore, the fill-in pattern to be played ends with only one measure.

In this way, the sounding period of the fill-in rhythm is switched to 2 bars or 1 bar depending on the performance state at that time. Therefore, the normal rhythm and the fill-in rhythm are always switched in an optimum state following the performance state at that time.

Although the key pressing speed is detected in the above embodiment, the key pressing pressure may be detected.

[Effects of the Invention] As described above, the present invention is an automatic rhythm playing device in which a rhythm pattern is changed according to a key pressing speed or a key pressing pressure. There is an advantage that the rhythm pattern changes very naturally and a good rhythm performance can be obtained.

Moreover, the value of the detection level at which the rhythm pattern is changed is not fixed, and varies depending on the level at which the performance condition of the player such as the key pressing speed and the key pressing pressure is constantly changing. A player of any type can freely change the rhythm pattern by changing the playing condition such as the key pressing speed and the key pressing pressure when changing the pattern.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an overall circuit diagram of the same example, FIG. 2 is a concrete circuit diagram of an abnormal value detector 3, and FIG. 3 is a time chart. Fig. 1 ... keyboard, 2 ... pressure speed detector, 3 ... abnormal value detector, 4 ... rhythm pattern selector, 5 ... tempo counter, 6 ... rhythm pattern memory, 7 ... rhythm sound source circuit, 8 ... ... comparator, 9 ... flip-flop, 10 ...
... Road kunta, 11 ... AND gate, 12 ... Arithmetic unit, 13 ... Multiplier, 15 ... Decoder.

Claims (5)

[Claims] 1. Rhythm pattern output means for storing a plurality of types of rhythm patterns, selecting and outputting any one of the rhythm patterns, and emitting sound according to the rhythm pattern from the rhythm pattern output means. A sound emission instructing means for instructing, a performance operator, a detecting means for detecting a level of change of an operation state every time the performance operator is operated, and a new operation by the detecting means for operating the performance operator. When a detection level is detected, at least a calculation unit that executes a predetermined calculation that reflects the detection level of the previous operation to obtain a calculation result; a calculation result of this calculation unit and a new detection level from the detection unit; And a changing means for changing the type of the rhythm pattern output from the rhythm pattern output means based on the comparison result of the comparing means. Automatic rhythm performance apparatus, characterized in that it comprises a. 2. The detection means detects the magnitude of the operation speed or the operation pressure of the performance operator.
The automatic rhythm playing device described in the item. 3. The automatic rhythm according to claim 1, wherein the changing means obtains a new calculation result by executing a predetermined calculation on the detection level from the detection means and the previous calculation result. Playing device. 4. The type of the rhythm pattern output from the rhythm pattern output means when the comparing means detects that the detection level from the detecting means is higher than the calculation result of the calculating means. The automatic rhythm playing device according to claim 1, wherein the rhythm pattern of the original type is restored after a lapse of a predetermined time. 5. The changing means changes the time from changing the type of the rhythm pattern to returning to the original type according to the detection level from the detecting means. The automatic rhythm playing device according to item 4.