Automatic player for electronic instrument

Abstract

Abstract PURPOSE: To facilitate a satisfactory automatic play having sufficient degree of freedome by consecutively writing the information of tones and duration of notes by the key operation in accordance with the address designation. CONSTITUTION: The tone voltage KV by the key depression of a key board 27 is stored in a sample hold circuit 28 in response to key-on signals KON and is confirmed through the sound generation from a speaker 18 through envelope generating circuits 22 and 23. On the other hand, that voltage KV is set through an A/D converter 41 by a set switch 33 and a writing switch 34 in the address position from an address generator 36, which has its stepwise advancement designated in response to the signals KON having passed through a differentiation circuit 51 of an RAM 31 receiving writing designation signals, with the aid of a note duration setting circuit 43 so that it is written together with the digital note duration signals having passed through an encoder 44. In response to the operation of a pause switch 52, the pause at the zero tone voltage level is also written in the RAM 31. If the reading command signals are impressed through a start switch 32, the tone and duration information including the puase of the RAM 31 is read out so that the automatic play having sufficient degree of freedom can be easily accomplished. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Takeshi Adachi
• 👤 Masahiko Koike
• 👤 Toshiyuki Takahashi
• 👤 Haruyuki Suzuki

Bibliographic Details