Electronic musical instrument of delayed feedback type
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United States of America Patent
Stats
-
Apr 4, 1995
Issued Date -
N/A
app pub date -
Jul 7, 1994
filing date -
Aug 9, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a tone signal synthesizer for synthesizing a tone signal by supplying a driving signal, into a closed loop circuit including a delay circuit and a filter, a filter coefficient which controls the characteristic of the filter is changed while a musical tone is generated. For example, a set of filter coefficients are provided at the time of key-on and are switched to another set of filter coefficients when a predetermined time is passed after the time of key-on. The set of filter coefficients are switched to a further set of filter coefficients at the time of key-off and then are switched to a still further set of filter coefficients when a predetermined time is passed after the time of key-off. It is possible to generate a musical tone which changes more complexly on the basis of the change of the filter characteristic, with the passage of time.
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