massign — Assigns a MIDI channel number to a Csound instrument.
ichnl -- MIDI channel number (1-16).
insnum -- Csound orchestra instrument number. If zero or negative, the channel is muted (i.e. it doesn't trigger a csound instrument, though information will still be received by opcodes like midiin).
“insname” -- A string (in double-quotes) representing a named instrument.
ireset -- If non-zero resets the controllers; default is to reset.
Assigns a MIDI channel number to a Csound instrument. Also useful to make sure a certain instrument (if its number is from 1 to 16) will not be triggered by midi noteon messages (if using something midiin to interpret midi information). In this case set insnum to 0 or a negative number.
If ichan is set to 0, the value of insnum is used for all channels. This way you can route all MIDI channels to a single Csound instrument. You can also disable triggering of instruments from MIDI note events from all channels with the following line:
massign 0,0
This can be useful if you are doing all MIDI evaluation within Csound with an always on instrument(e.g. using midiin and turnon) to avoid doubling the instrument when a note is played.
Here is an example of the massign opcode. It uses the file massign.csd.
Example 474. Example of the massign 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 -+rtmidi=virtual -M0 ;;;realtime audio out and realtime midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ;-o massign.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 giengine fluidEngine ; soundfont path to manual/examples isfnum fluidLoad "19Trumpet.sf2", giengine, 1 fluidProgramSelect giengine, 1, isfnum, 0, 56 massign 0,0 ;disable triggering of all instruments on all channels, but massign 12,10 ;assign instr. 10 to midi channel 12 massign 3,30 ;assign instr. 30 to midi channel 3 instr 10 ; soundfont only on midi channel 12 mididefault 60, p3 midinoteonkey p4, p5 ; in midi notes ikey init p4 ivel init p5 fluidNote giengine, 1, ikey, ivel endin instr 30 ; FM-oscilator only on midi channel 3 mididefault 60, p3 midinoteoncps p4, p5 ; in Hertz icps init p4 iamp init p5 iamp = iamp/127 kenv madsr 0.5, 0, 1, 0.5 asig foscil iamp*kenv, icps, 1, 1.414, 2, 1 outs asig, asig endin instr 99 ; output sound from fluidengine imvol init 7 aL, aR fluidOut giengine outs aL*imvol, aR*imvol endin </CsInstruments> <CsScore> ; sine f 1 0 16384 10 1 i 10 0 2 60 100 ;one note on the trumpet in midi and... i 30 2 2 220 80 ;one FM note in Hz i 99 0 60 ;stay active for 60 sec. e </CsScore> </CsoundSynthesizer>