noteondur
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## noteondur

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

## Description

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.

## See Also

noteoff, noteon, noteondur2

## 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.

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