Music synthesizer with breath-sensing modulator
AssigneeCMB Colonia Management-und Beratungsgesellschaft mbH & Co. K.G.
InventorsJobst Fricke, Wolfgang Voigt, Jurgen Schmitz
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Abstract
Imitation sounds of musical instruments, especially brass wind instruments, re synthesized by using a pulse generator source driving an AGC amplifier channel having an AGC amplifier and formant filters and a limiter, the gain of the AGC amplifier being multiplicatively controlled by an instantaneously-varying control AGC signal derived from the output of the channel. The AGC signal can also be varied at the AGC point by the signal from a breath-sensing microphone in a whistle or pipe.
Claims10
A circuit for producing a sound signal comprising a sound signal source (10) driving a signal modification channel including in cascade a variable gain amplifier (16) which multiplies its input signal by a gain control signal, a limiter (24,25), a low pass filter (25,46,54), formant filter means (48,50,52), and output terminal (28),
- said signal modification channel further having a gain control terminal (20) for receiving the gain control signal to control the instantaneous signal gain of said variable gain amplifier,
- and a feedback channel (30,32,34,36) including circuit means (34) having a signal transfer function providing for a frequency limit of the signal applied to said gain control terminal derived from the output terminal signal, and dependent on the instantaneous value of the signal applied to the feedback channel,
- said feedback channel producing said gain control signal as a function of the instantaneous value of said output signal.
Dependencies are inferred from the claim text.