A control circuit for controlling an automatic rhythm generating circuit of an automatic rhythm performance apparatus comprises a memory for controlling the rhythm start or stop operation of the automatic rhythm generating circuit by an output state, a rhythm performance control signal supply circuit including a plurality of rhythm performance control switches, and a logic circuit having inputs coupled to the outputs of the rhythm performance control signal supply circuit and to the outputs of the memory and having outputs coupled to the inputs of the memory. The state of signals at the outputs of the rhythm performance control signal supply circuit is variable by the operation of the control switches. The logic circuit causes the memory to be set from one output state to another state in response to a variation in the state of signals at the outputs of the rhythm performance control signal supply circuit.
A tempo control device for automatic performance according to this invention is of a type wherein a tempo of automatic performance is caused to automatically follow that of manual performance as the latter changes during performance. When difference in tempo between manual and automatic performance falls within a predetermined range, this automatic follow-up control is performed by measuring the manual performance tempo with accuracy and by controlling the frequency of tempo clock pulses in the automatic performance on the basis of the value thus measured. The predetermined range may be one fixed range for all notes of various note-lengths, or alternatively, different ranges may be employed in accordance with the length of notes.
A sequencer unit of electronic musical instrument including a plurality of sequencers each storing specific performance data which are generated by operating a keyboard in advance. In the case where an automatic performance is played based on first performance data of selected one sequencer and then second performance data of another sequencer are selected, the first performance data are smoothly changed over to the second performance data and then the automatic performance is played based on the second performance data at a desirable timing which can be arbitrarily determined. Even when the ending timing of performance data to be written in the sequencer does not match with the end of bar, the length of performance data read from the sequencer can be easily adjusted to predetermined bars. Further, it is possible to easily adjust a break period in which the automatic performance is broken so that keyboard performance can be played.
In an electronic organ or the like constructed of a plurality of large scale integrated circuit (LSI) chips, the present disclosure relates to a master control LSI chip having a counter providing multiplexing drive outputs and also having a read only memory (ROM) programmed to provide rhythm voice patterns.
When picking of a string is performed, the vibration of the string is detected accurately and quickly. When a fret operation position is changed during generation of a musical tone caused by the string picking, the pitch of the musical tone is changed to the one corresponding to the new fret operation position without generating a new musical tone. When the same string is stroked successively, the succeeding musical tone is generated while keeping the reverberation of the previous musical tone. The musical tone once generated will be stopped from being generated upon elapse of a predetermined time from the beginning of the tone generation, irrespective of the type of its timbre. When a fret operation state is changed to an open-string operation state after the string picking, the generation of the musical tone being generated stops at that timing. When this change occurs, it is selectable whether the generation of the musical tone is to be stopped or its pitch is to be changed to the one corresponding to the open-string operation state. The generated musical tone can freely be stopped from being generated through a manual operation.
When picking of a string is performed, the vibration of the string is detected accurately and quickly. When a fret operation position is changed during generation of a musical tone caused by the string picking, the pitch of the musical tone is changed to the one corresponding to the new fret operation position without generating a new musical tone. When the same string is stroked successively, the succeeding musical tone is generated while keeping the reverberation of the previous musical tone. The musical tone once generated will be stopped from being generated upon elapse of a predetermined time from the beginning of the tone generation, irrespective of the type of its timbre. When a fret operation state is changed to an open-string operation state after the string picking, the generation of the musical tone being generated stops at that timing. When this change occurs, it is selectable whether the generation of the musical tone is to be stopped or its pitch is to be changed to the one corresponding to the open-string operation state. The generation musical tone can freely be stopped from being generated through a manual operation.
