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noteondur

Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.

Syntax

noteondur ichn, inum, ivel, idur

Initialization

ichn -- MIDI channel number (1-16)

inum -- note number (0-127)

ivel -- velocity (0-127)

idur -- how long, in seconds, this note should last.

Performance

noteondur (i-rate note on with duration) sends a noteon and a noteoff MIDI message both with the same channel, number and velocity. Noteoff message is sent after idur seconds are elapsed by the time noteondur was active.

noteondur differs from noteondur2 in that noteondur truncates note duration when current instrument is deactivated by score or by real-time playing, while noteondur2 will extend performance time of current instrument until idur seconds have elapsed. In real-time playing, it is suggested to use noteondur also for undefined durations, giving a large idur value.

Any number of noteondur opcodes can appear in the same Csound instrument, allowing chords to be played by a single instrument.

Examples

Here is an example of the noteondur opcode. It uses the file noteondur.csd.

This example generates notes for every note received on the MIDI input. It generates MIDI notes on csound's MIDI output, so be sure to connect something.

Example of the noteondur opcode.
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<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  ;Turned on by MIDI notes on channel 1

  ifund   notnum
  ivel  veloc
  idur = 1

  ;chord with single key
  noteondur     1, ifund,   ivel, idur
  noteondur     1, ifund+3, ivel, idur
  noteondur     1, ifund+7, ivel, idur
  noteondur     1, ifund+9, ivel, idur

endin

</CsInstruments>
<CsScore>
; Play Instrument #1 for 60 seconds.

i1 0 60

</CsScore>
</CsoundSynthesizer>

See also

Note-on/Note-off Output

Credits

Author: Gabriel Maldonado
Italy

New in Csound version 3.47

Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.