lposcila — Read sampled sound from a table with looping and high precision.
ar -- output signal
aamp -- amplitude
kfreqratio -- multiply factor of table frequency (for example: 1 = original frequency, 1.5 = a fifth up , .5 = an octave down)
kloop -- start loop point (in samples)
kend -- end loop point (in samples)
lposcila is the same as lposcil, but has an audio-rate amplitude argument (instead of k-rate) to allow fast envelope transients.
Here is an example of the lposcila opcode. It uses the file lposcila.csd.
Example 456. Example of the lposcila 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 lposcila.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 kcps = 1.3 ;a 3d up kloop = 0 ;loop start time in samples kend = 10000 ;loop end time in samples aenv expsega 0.01, 0.1, 1, 0.1, 0.5, 0.5, 0.01 ;envelope with fast and short segment asig lposcila aenv, kcps, kloop, kend, 1 ;use it for amplitude outs asig, asig endin </CsInstruments> <CsScore> ; Its table size is deferred, ; and format taken from the soundfile header. f 1 0 0 1 "beats.wav" 0 0 0 ; Play Instrument #1 for 6 seconds. ; This will loop the drum pattern several times. i 1 0 2 e </CsScore> </CsoundSynthesizer>