midiin
midiin — Returns a generic MIDI message received by the MIDI IN port.
Performance
kstatus -- the type of MIDI message. Can be:
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128 (note off)
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144 (note on)
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160 (polyphonic aftertouch)
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176 (control change)
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192 (program change)
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208 (channel aftertouch)
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224 (pitch bend
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0 if no MIDI message are pending in the MIDI IN buffer
kchan -- MIDI channel (1-16)
kdata1, kdata2 -- message-dependent data values
midiin has no input arguments, because it reads at the MIDI in port implicitly. It works at k-rate. Normally (i.e., when no messages are pending) kstatus is zero, only when MIDI data are present in the MIDI IN buffer, is kstatus set to the type of the relevant messages.
![[Note]](images/note.png)
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Note |
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Be careful when using midiin in low numbered instruments, since a MIDI note will launch additional instances of the instrument, resulting in duplicate events and weird behaviour. Use massign to direct MIDI note on messages to a different instrument or to disable triggering of instruments from MIDI. |
Examples
Here is an example of the midiin opcode. Play midiin.csd
Example 598. Example of the midiin 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 -M0 -+rtmidi=virtual ;;;RT audio I/O with MIDI in ; For Non-realtime ouput leave only the line below: ; -o midiin.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 10 nchnls = 1 ; Example by schwaahed 2006 massign 0, 130 ; make sure that all channels pgmassign 0, 130 ; and programs are assigned to test instr instr 130 knotelength init 0 knoteontime init 0 kstatus, kchan, kdata1, kdata2 midiin if (kstatus == 128) then knoteofftime times knotelength = knoteofftime - knoteontime printks "kstatus= %d, kchan = %d, \\tnote# = %d, velocity = %d \\tNote OFF\\t%f %f\\n", 0, kstatus, kchan, kdata1,kdata2, knoteofftime, knotelength elseif (kstatus == 144) then knoteontime times printks "kstatus= %d, kchan = %d, \\tnote# = %d, velocity = %d \\tNote ON\\t%f\\n", 0, kstatus, kchan, kdata1, kdata2, knoteontime elseif (kstatus == 160) then printks "kstatus= %d, kchan = %d, \\tkdata1 = %d, kdata2 = %d \\tPolyphonic Aftertouch\\n", 0, kstatus, kchan, kdata1, kdata2 elseif (kstatus == 176) then printks "kstatus= %d, kchan = %d, \\t CC = %d, value = %d \\tControl Change\\n", 0, kstatus, kchan, kdata1, kdata2 elseif (kstatus == 192) then printks "kstatus= %d, kchan = %d, \\tkdata1 = %d, kdata2 = %d \\tProgram Change\\n", 0, kstatus, kchan, kdata1, kdata2 elseif (kstatus == 208) then printks "kstatus= %d, kchan = %d, \\tkdata1 = %d, kdata2 = %d \\tChannel Aftertouch\\n", 0, kstatus, kchan, kdata1, kdata2 elseif (kstatus == 224) then printks "kstatus= %d, kchan = %d, \\t ( data1 , kdata2 ) = ( %d, %d )\\tPitch Bend\\n", 0, kstatus, kchan, kdata1, kdata2 endif endin </CsInstruments> <CsScore> i130 0 3600 e </CsScore> </CsoundSynthesizer>