zacl — Clears one or more variables in the za space.
kfirst -- first za location in the range to clear.
klast -- last za location in the range to clear. If not given, only kfirst location is cleared
zacl clears one or more variables in the za space. This is useful for those variables which are used as accumulators for mixing a-rate signals at each cycle, but which must be cleared before the next set of calculations.
Here is an example of the zacl opcode. It uses the file zacl.csd.
Example 1228. Example of the zacl 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 ; Audio out Audio in No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o zacl.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 ksmps = 32 nchnls = 1 0dbfs = 1 ; Initialize the ZAK space. ; Create 1 a-rate variable and 1 k-rate variable. zakinit 1, 1 ; Instrument #1 -- a simple waveform. instr 1 ; Generate a simple sine waveform. asin oscili 0.2, 440 ; Declick asin *= linsegr(0, 0.05, 1, 0.05, 0) ; Send the sine waveform to za variable #1. zaw asin, 1 endin ; Instrument #2 -- generates audio output. instr 2 ; Send za location #1 to channel 1 a1 zar 1 out a1 ; Clear the za variables, get them ready for ; another pass. zacl 0, 1 endin </CsInstruments> <CsScore> ; Play Instrument #1 for one second. i 1 0 1 ; Play Instrument #2 until end of performance i 2 0 -1 e 1.5 </CsScore> </CsoundSynthesizer>