tabrec — Recording of control signals.
ktrig_start -- start recording when non-zero.
ktrig_stop -- stop recording when knumtics trigger impulses are received by this input argument.
knumtics -- stop recording or reset playing pointer to zero when the number of tics defined by this argument is reached.
kfn -- table where k-rate signals are recorded.
kin1,...,kinN -- input signals to record.
The tabrec and tabplay opcodes allow to record/playback control signals on trigger-temporization basis.
tabrec opcode records a group of k-rate signals by storing them into kfn table. Each time ktrig_start is triggered, tabrec resets the table pointer to zero and begins to record. Recording phase stops after knumtics trigger impulses have been received by ktrig_stop argument.
These opcodes can be used like a sort of ``middle-term'' memory that ``remembers'' generated signals. Such memory can be used to supply generative music with a coherent iterative compositional structure.
Here is an example of the tabrec opcode. It uses the file tabrec.csd.
Example 1083. Example of the tabrec 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 oscil.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 gifn ftgen 0,0,1049576,2,0 ; record control signals instr 1 ktrig_start init 1 koct rspline 7,10,1,2 kpan rspline 7,10,0.1,0.9 ktrig_stop = 1 knumtics = kr*p3 tabrec ktrig_start,ktrig_stop,knumtics,gifn,koct,kpan ktrig_start = 0 endin ; play control signals instr 2 koct,kpan init 0 ktrig init 1 knumtics = kr*p3 tabplay ktrig,knumtics,gifn,koct,kpan ktrig = 0 asig poscil 0.1, cpsoct(koct) aL,aR pan2 asig,kpan outs aL,aR endin </CsInstruments> <CsScore> i1 0 10 i2 2 10 i2 4 10 e </CsScore> </CsoundSynthesizer>