comb
Reverberates an input signal with a “colored” frequency response.
Syntax
Initialization
ilpt -- loop time in seconds, which determines the “echo density” of the reverberation. This in turn characterizes the “color” of the comb filter whose frequency response curve will contain ilpt * sr/2 peaks spaced evenly between 0 and sr/2 (the Nyquist frequency). Loop time can be as large as available memory will permit. The space required for an n second loop is n*sr floating or double numbers (usually 4 or 8 bytes). Delay space is allocated and returned as in delay.
iskip (optional, default=0) -- initial disposition of delay-loop data space (cf. reson). The default value is 0.
insmps (optional, default=0) -- delay amount, as a number of samples.
Performance
krvt -- the reverberation time (defined as the time in seconds for a signal to decay to 1/1000, or 60dB down from its original amplitude).
This filter reiterates input with an echo density determined by loop time ilpt. The attenuation rate is independent and is determined by krvt, the reverberation time (defined as the time in seconds for a signal to decay to 1/1000, or 60dB down from its original amplitude). Output from a comb filter will appear only after ilpt seconds.
Examples
Here is an example of the comb opcode. It uses the file comb.csd.
See also
Credits
Barry L. Vercoe