gain — Adjusts the amplitude audio signal according to a root-mean-square value.
ihp (optional, default=10) -- half-power point (in Hz) of a special internal low-pass filter. The default value is 10.
iskip (optional, default=0) -- initial disposition of internal data space (see reson). The default value is 0.
asig -- input audio signal
gain provides an amplitude modification of asig so that the output ares has rms power equal to krms. rms and gain used together (and given matching ihp values) will provide the same effect as balance
Here is an example of the gain opcode. Play gain.csd
Example 404. Example of the gain 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 gain.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 asrc buzz .8, 440, sr/440, 1 ; band-limited pulse train. a1 reson asrc, 1000, 100 ; Sent through a2 reson a1, 3000, 500 ; 2 filters krms rms asrc ; then balanced afin gain a2, krms ; with source outs afin, afin endin </CsInstruments> <CsScore> ;sine wave. f 1 0 16384 10 1 i 1 0 2 e </CsScore> </CsoundSynthesizer>