JPS6320356B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an autorhythm device that changes a rhythm pattern in conjunction with a change in tempo.

Conventionally, autorhythm devices of the type that can set the tempo arbitrarily have been proposed. However, with this type of autorhythm device, changing the tempo does not change the rhythm pattern itself, but only changes the rate at which the rhythm pattern is generated. There was a drawback that it did not give a "vine" feel.

An object of the present invention is to provide a novel autorhythm device that can produce a rhythmic feel similar to manual rhythm performance.

The autorhythm device according to the present invention is characterized in that the rhythm pattern is subtly changed depending on the tempo of the rhythm, and embodiments shown in the accompanying drawings will be described in detail below.

FIG. 1 shows an autorhythm device according to an embodiment of the present invention. The variable tempo oscillator (OSC) 10 has a tempo volume 12 whose resistance value is variably set by a tempo adjustment knob 12a arranged on the panel surface.
The tempo clock signal TCL is generated at a frequency corresponding to the set resistance value of the tempo clock signal TCL. The tempo clock signal TCL is appropriately frequency-divided by a variable frequency divider circuit 14 and supplied as a clock input CK to an address counter 16 consisting of a variable modulo counter. The counter 16 counts the output signal of the variable frequency dividing circuit 14 and supplies the counted output CO to the rhythm pattern memory circuit 18, which includes a group of rhythm selection switches 20a arranged on the panel surface. A rhythm selection signal S generated from a rhythm selection switch (SW) circuit 20 based on the rhythm selection operation at is also supplied.

The rhythm pattern memory circuit 18 includes, for example, a decoder that decodes the count output CO from the counter 16, and a ROM that stores multiple sets of rhythm pattern data corresponding to the number of rhythm selection switches.
(read-only memory) and this
The rhythm pattern signal RP is transmitted by reading out rhythm pattern data corresponding to a specific rhythm indicated by the rhythm selection signal S from the ROM in response to sequential pulse outputs from the decoder.

The tempo detection circuit 22 receives a tempo clock signal.
A counter 24 that receives TCL as an input, and a latch circuit 26 that latches the counting output of this counter 24.
Then, a reference signal is sent to the counter 24 and the latch circuit 26 as a reset signal R and a load signal L, respectively.
Reference signal source 28 supplying RF and latch circuit 2
A tempo determination circuit 30 is provided for determining the tempo by checking the latch output of No. 6. The counter 24 is reset periodically by the reference signal RF, counts the tempo clock signal TCL after the first reset until the next reset, and supplies the count output to the latch circuit 26. Latch circuit 26
latches the counting output of the counter 24 immediately before the counter 24 is reset after the first reset, and supplies the latched data to the tempo determination circuit 30. The tempo determination circuit 30 examines the latch data at this time, determines which of the three stages the tempo falls in as shown in FIG. 2, and sends a determination output TO indicating the determination result as 3-bit signals a, b, and c. do. In other words, the discrimination output TO is that when the tempo indicated by the latch data is slower than 170 quarter notes per minute, the signal a is "1", and when the tempo is between 170 and 230, the signal b is "1"; If the speed is fast, the signal c is generated to be "1".

The discrimination output TO is supplied to the variable frequency divider circuit 14 to control the frequency division ratio, while the address counter 16
is supplied to control the base number N. Further, the discrimination output TO is supplied to the rhythm pattern memory circuit 18 to control the read address. The reason why the variable frequency dividing circuit 14 is provided is to prevent the reading speed of the rhythm pattern memory circuit 18 from increasing more than the amount corresponding to the increase in tempo since the digit of the counter 16 is controlled to decrease when the tempo increases. be. The counter 16 also includes a rhythm selection switch circuit 2.
A beat designation signal S ₀ is supplied for operation switching from 0 to 3 beats or 4 beats.

The rhythm pattern signal RP from the rhythm pattern memory circuit 18 is supplied to the rhythm sound source circuit 32,
The rhythm sound source circuit 32 is configured to generate a rhythm sound signal by driving an appropriate rhythm sound source according to the rhythm pattern signal RP. Rhythm sound source circuit 3
The rhythm sound signal from 2 is supplied to a speaker 36 via a power amplifier 34 and converted into sound.

Here, the operation of the autorhythm device will be explained using the swing rhythm pattern illustrated in FIG. 2. First, if the tempo is slower than 170 in terms of the number of quarter notes per minute, the base number N of the address counter 16 is set to 36 according to the discrimination output TO, so the address count value changes from 1 to 36. The rhythm pattern signal RP is generated with the period of time being one cycle (corresponding to one bar). The rhythm pattern signal RP at this time is supplied to the rhythm sound source circuit 32, which drives the cymbal CY sound source at the timing shown by the black circle in _A1 in FIG.
Drive the Hi-Hatsu HH sound source at the timing shown by the black circle in Figure _A2 .

Next, if the tempo becomes slightly faster and falls into the range of 170 to 230 quarter notes per minute,
The base number N of the counter 16 is 32 according to the discrimination output TO
is set to At this time, the rhythm pattern memory circuit 18 selects cymbal CY and high hat HH.
32 out of 36 read addresses are selected according to the discrimination output TO so that the rhythm patterns correspond to _B1 and _B2 in FIG. 2, respectively, while the variable frequency dividing circuit 14 The frequency division ratio is set according to the discrimination output TO so as to substantially cancel out the increase in read speed due to a decrease in the base number N or the number of read addresses. As a result, the rhythm pattern signal RP
is generated in order to enable the rhythm performance of the patterns shown in FIG. _2, B1 and _B2 , with one cycle being the period during which the address count value changes from 1 to 32.

Also, the tempo becomes even faster, reaching 4 per minute.
When the number of diacritics exceeds 230, the base number N of the counter 16 is calculated according to the discrimination output TO.
is set to 28, and correspondingly variable frequency divider circuit 1
The frequency division ratio of 4 and the read address of the rhythm pattern memory circuit 18 are controlled in the same manner as described above, and the rhythm patterns of cymbal CY and high hat HH are respectively used as the rhythm pattern signal RP in FIG _{. 2C1.}
and C ₂ .

In the above embodiment, a rhythm pattern that is slightly different from the basic rhythm pattern is obtained by controlling the 36 read addresses to decrease as the tempo increases. It is also possible to store a rhythm pattern and a slightly modified rhythm pattern together, and to read out these rhythm patterns as appropriate depending on the rhythm tempo. However, if you do this,
The memory capacity is significantly increased compared to the previously described embodiment (for example, three times the memory capacity is required to do the same thing as in FIG. 2).

Furthermore, although not shown in the above embodiment, by controlling the rhythm sound source circuit 32 with the discrimination output TO, it is also possible to appropriately add or omit different sound sources in the rhythm sound source circuit according to tempo changes. This is effective in creating a rhythmic feel similar to manual rhythm performance.

Furthermore, in the above embodiment, only the main pattern was changed according to the tempo, but the prelude,
Of course, intro patterns, break patterns, etc. inserted as interludes can also be changed according to the tempo.

As described above, the autorhythm device of the present invention subtly changes the rhythm pattern according to changes in tempo, so it can produce a rhythmic feel similar to manual rhythm performance, and exhibits excellent performance performance. It is possible.

That is, according to the present invention, it is determined which of a plurality of predetermined tempo ranges the set tempo belongs to, and according to the determination result, a rhythm pattern signal having different pattern contents for each tempo range is set at the set tempo. I made it to occur according to
By simply performing a tempo change operation, the pattern contents are automatically changed and controlled, and it is possible to easily enjoy a rhythm performance with a wide variety of tempo and pattern changes.

Furthermore, as shown in the above embodiment, a rhythm pattern that should be commonly used for multiple tempo ranges is stored in memory, and this rhythm pattern is read out at different speeds and timings depending on the determination result. If a rhythm pattern signal having a different pattern content is generated for each tempo range by reading the rhythm pattern signal, there is an advantage that the memory capacity can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an autorhythm device according to an embodiment of the present invention, and FIG. 2 is a rhythm pattern diagram for explaining the operation of the device shown in FIG. 10... Variable tempo oscillator, 12... Tempo volume, 14... Variable frequency divider circuit, 16... Address counter, 18... Rhythm pattern memory circuit, 20... Rhythm selection switch circuit, 22...
Tempo detection circuit, 32...Rhythm sound source circuit.

Claims (1)

[Claims] 1. (a) Tempo setting means for variably setting the tempo of a rhythm; (b) Which of a plurality of predetermined tempo ranges does the tempo set by the tempo setting means belong to? (c) a signal generating means capable of generating a rhythm pattern signal having different pattern contents for each tempo range regarding a desired rhythm type; (d) a signal generating means corresponding to the determination result of the determining means; (e) a control means for causing the signal generation means to generate a rhythm pattern signal having pattern content according to a tempo set by the tempo setting means; (e) a rhythm sound according to the rhythm pattern signal generated from the signal generation means; An autorhythm device comprising a rhythm sound generating means for generating a signal. 2 (a) tempo setting means for variably setting the tempo of the rhythm; (b) clock generation means for generating a tempo clock signal having a frequency corresponding to the tempo set by the tempo setting means; and (c) the above-mentioned. (d) determining means for determining which of a plurality of predetermined tempo ranges the tempo set by the tempo setting means belongs; and (d) a frequency division ratio that differs for each tempo range based on the determination result of the determining means. (e) counting means for counting the frequency division output from the frequency dividing means in a different base number for each tempo range based on the determination result of the determining means; (f) storage means storing a rhythm pattern to be commonly used in the plurality of tempo ranges regarding a desired rhythm type; (h) readout control means for generating rhythm pattern signals having different pattern contents for each tempo range from the storage means by reading the rhythm pattern at different readout speeds and readout timings for each tempo range; rhythm sound generation means for generating a rhythm sound signal according to the rhythm pattern signal generated from the storage means, and the frequency dividing means calculates a change in reading speed based on the difference in the base number for each tempo range. An autorhythm device characterized in that a frequency division ratio is set so as to substantially cancel the frequency.