Touch responsive envelope shape generation device

Details Touch responsive envelope shape generation device Touch responsive envelope shape generation device

1990-08-16

1994-03-08

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

G10H 1057

Patent

active

052929973

ABSTRACT:
An envelope shape generation device includes an envelope shape memory storing envelope shape data, a touch information generation circuit for generating touch information, an envelope shape data reading circuit for reading out the envelope shape data prestored in the envelope shape memory in response to the touch information to form an envelope shape signal. The envelope shape reading circuit includes a first envelope reading circuit for reading out a waveform section from an attack portion to a portion immediately before starting of a release envelope shape in response to key-on information and a second envelope shape reading circuit for reading out a release envelope shape following the waveform section read by a first envelope reading circuit in response to key-off information, and a release envelope correction circuit for correcting a head value of the read out release envelope shape to agree with the read out envelope shape value of the first envelope shape section so that the second envelope shape section is connected smoothly to the first envelope shape section.

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patent: 4077294 (1978-03-01), Hiyoshi et al.
patent: 4440056 (1984-04-01), Kozuki et al.
patent: 4535669 (1985-08-01), Kaneko
patent: 4655114 (1987-04-01), Sunada
patent: 4794837 (1989-01-01), Katoh
patent: 4893538 (1990-01-01), Masaki et al.
patent: 4909121 (1990-03-01), Usa et al.

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