Method and apparatus for producing two complementary pitch signals without glitch
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United States of America Patent
Stats
-
Jan 18, 1983
Issued Date -
N/A
app pub date -
Jan 21, 1981
filing date -
Nov 26, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Chorus effect for an original audio signal is developed by forming a complementary pair of signals from the original. The original signal is stored at a write rate (f.sub.c), then, after a delay, strobed to a pair of FIFO registers, one strobe at a higher rate (f.sub.c +.DELTA.f), the other strobe at a lower rate (f.sub.c -.DELTA.f), respectively. The faster readout will decrease the delay (to zero, causing foldover glitch), the slower readout will increase the delay (to excess delay, causing discrete echo). The strobe frequencies are reversed between FIFO registers whenever the delay becomes too great or too small.
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