midion — Generates MIDI note messages at k-rate.
kchn -- MIDI channel number (1-16)
knum -- note number (0-127)
kvel -- velocity (0-127)
midion (k-rate note on) plays MIDI notes with current kchn, knum and kvel. These arguments can be varied at k-rate. Each time the MIDI converted value of any of these arguments changes, last MIDI note played by current instance of midion is immediately turned off and a new note with the new argument values is activated. This opcode, as well as moscil, can generate very complex melodic textures if controlled by complex k-rate signals.
Any number of midion opcodes can appear in the same Csound instrument, allowing a counterpoint-style polyphony within a single instrument.
Here is a simple example of the midion opcode. It uses the file midion_simple.csd.
Example 502. Simple Example of the midion opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
This example generates a minor chord over every note received on the MIDI input. It generates MIDI notes on csound's MIDI output, so be sure to connect something.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in No messages -odac -iadc -d -M0 -Q1 ;;;RT audio I/O with MIDI in </CsOptions> <CsInstruments> sr = 44100 kr = 4410 ksmps = 10 nchnls = 2 ; Example by Giorgio Zucco 2007 instr 1 ;Triggered by MIDI notes on channel 1 ifund notnum ivel veloc knote1 init ifund knote2 init ifund + 3 knote3 init ifund + 5 ;minor chord on MIDI out channel 1 ;Needs something plugged to csound's MIDI output midion 1, knote1,ivel midion 1, knote2,ivel midion 1, knote3,ivel endin </CsInstruments> <CsScore> ; Dummy ftable f0 60 </CsScore> </CsoundSynthesizer>
Here is another example of the midion opcode. It uses the file midion_scale.csd.
Example 503. Example of the midion opcode to generate random notes from a scale.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
This example generates random notes from a given scale for every note received on the MIDI input. It generates MIDI notes on csound's MIDI output, so be sure to connect something.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in No messages -odac -iadc -d -M0 -Q1 ;;;RT audio I/O with MIDI in </CsOptions> <CsInstruments> sr = 44100 kr = 4410 ksmps = 10 nchnls = 2 ; Example by Giorgio Zucco 2007 instr 1 ; Triggered by MIDI notes on channel 1 ivel veloc krate = 8 iscale = 100 ;f ; Random sequence from table f100 krnd randh int(14),krate,-1 knote table abs(krnd),iscale ; Generates random notes from the scale on ftable 100 ; on channel 1 of csound's MIDI output midion 1,knote,ivel endin </CsInstruments> <CsScore> f100 0 32 -2 40 50 60 70 80 44 54 65 74 84 39 49 69 69 ; Dummy ftable f0 60 </CsScore> </CsoundSynthesizer>