outch
outch — Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
Description
Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
Performance
outch outputs asig1 on the channel determined by kchan1, asig2 on the channel determined by kchan2, etc.
![[Note]](images/note.png)
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Note |
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The highest number for kchanX available for use with outch depends on nchnls. If kchanX is greater than nchnls, asigX will be silent. Note that outch will give a warning but not an error in this case. |
Examples
Here is an example of the outch opcode. It uses the file outch.csd.
Example 703. Example of the outch 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 ; For Non-realtime ouput leave only the line below: ; -o outch.wav -W ;;; for file output any platform ; By Stefano Cucchi - 2020 </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 asig vco2 0.2, 100 ; Audio signal. kout randomh 1, 2, 5 ; Extracts random number between 1 & 2 - 5 times per second. outch kout,asig ; Sends the signal to the channel according to "kout". printks "signal is sent to channel %d\\n", .2, kout ; Prints the channel where you hear the sound. endin </CsInstruments> <CsScore> i 1 0 15 e </CsScore> </CsoundSynthesizer>
Here is another example of the outch opcode. It uses the file outch-2.csd.
Example 704. Example of the outch 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 outch.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 5 0dbfs = 1 instr 1 asig vco2 .05, 100 ; sawtooth waveform at low volume kcut line 100, p3, 30 ; Vary cutoff frequency kresonance = .7 inumlayer = 3 asig lowresx asig, kcut, kresonance, inumlayer klfo lfo 4, .5, 4 klfo = klfo+1 ; offset of 1 printks "signal is sent to channel %d\\n", .1, klfo outch klfo,asig endin </CsInstruments> <CsScore> i 1 0 30 e </CsScore> </CsoundSynthesizer>
signal is sent to channel 5
signal is sent to channel 4
signal is sent to channel 3
signal is sent to channel 2
signal is sent to channel 1
signal is sent to channel 5
........
Here is another example of the outch opcode. It uses the file outch-3.csd.
Example 705. Another example of the outch opcode.
<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 outch-2.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 4 0dbfs = 1 seed 0 instr 1 ;random movements between 4 speakers with outch ichn1 random 1, 4.999 ;channel to start ichn2 random 1, 4.999 ;channel to end prints "Moving from speaker %d to speaker %d%n", int(ichn1), int(ichn2) asamp soundin "fox.wav" kmov linseg 0, p3, 1 a1, a2 pan2 asamp, kmov outch int(ichn1), a1, int(ichn2), a2 endin </CsInstruments> <CsScore> r 5 i 1 0 3 e </CsScore> </CsoundSynthesizer>
See also
More information on this opcode: http://www.csoundjournal.com/issue16/audiorouting.html , written by Andreas Russo