limit — Sets the lower and upper limits of the value it processes.
ares limit asig, klow, khigh
ires limit isig, ilow, ihigh
kres limit ksig, klow, khigh
ires[] limit isig[], ilow, ihigh
kres[] limit ksig[], klow, khigh
xsig -- input signal
klow -- low threshold
khigh -- high threshold
limit sets the lower and upper limits on the xsig value it processes. If xhigh is lower than xlow, then the output will be the average of the two - it will not be affected by xsig.
This opcode is useful in several situations, such as table indexing or for clipping and modeling a-rate, i-rate or k-rate signals.
Here is an example of the limit opcode. It uses the file limit.csd.
Example 502. Example of the limit 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 limit.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 0dbfs = 1 nchnls = 2 instr 1 ; Limit / Mirror / Wrap igain = p4 ;gain ilevl1 = p5 ; + level ilevl2 = p6 ; - level imode = p7 ;1 = limit, 2 = mirror, 3 = wrap ain soundin "fox.wav" ain = ain*igain if imode = 1 goto limit if imode = 2 goto mirror asig wrap ain, ilevl2, ilevl1 goto outsignal limit: asig limit ain, ilevl2, ilevl1 goto outsignal mirror: asig mirror ain, ilevl2, ilevl1 outsignal: outs asig*.5, asig*.5 ;mind your speakers endin </CsInstruments> <CsScore> ; Gain +Levl -Levl Mode i1 0 3 4.00 .25 -1.00 1 ;limit i1 4 3 4.00 .25 -1.00 2 ;mirror i1 8 3 4.00 .25 -1.00 3 ;wrap e </CsScore> </CsoundSynthesizer>