rezzy — A resonant low-pass filter.
imode (optional, default=0) -- high-pass or low-pass mode. If zero, rezzy is low-pass. If not zero, rezzy is high-pass. Default value is 0. (New in Csound version 3.50)
iskip (optional, default=0) -- if non zero skip the initialisation of the filter. (New in Csound version 4.23f13 and 5.0)
asig -- input signal
xfco -- filter cut-off frequency in Hz. As of version 3.50, may i-,k-, or a-rate.
xres -- amount of resonance. Values of 1 to 100 are typical. Resonance should be one or greater. As of version 3.50, may a-rate, i-rate, or k-rate.
rezzy is a resonant low-pass filter created empirically by Hans Mikelson.
Here is an example of the rezzy opcode. It uses the file rezzy.csd.
Example 766. Example of the rezzy opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o rezzy.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 0dbfs = 1 nchnls = 2 instr 1 asaw vco2 .3, 110 ;sawtooth kcf line 1760, p3, 220 ;vary cut-off frequency from 220 to 1280 Hz kres = p4 ;vary resonance too ares rezzy asaw, kcf, kres asig balance ares, asaw outs asig, asig endin </CsInstruments> <CsScore> i 1 0 4 10 i 1 + 4 30 i 1 + 4 120 ;lots of resonance e </CsScore> </CsoundSynthesizer>