octmidi
octmidi — Get the note number, in octave-point-decimal units, of the current MIDI event.
Performance
Get the note number of the current MIDI event, expressed in octave-point-decimal units, for local processing.
![[Note]](images/note.png)
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octmidi vs. octmidinn |
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The octmidi opcode only produces meaningful results in a Midi-activated note (either real-time or from a Midi score with the -F flag). With octmidi, the Midi note number value is taken from the Midi event that is internally associated with the instrument instance. On the other hand, the octmidinn opcode may be used in any Csound instrument instance whether it is activated from a Midi event, score event, line event, or from another instrument. The input value for octmidinn might for example come from a p-field in a textual score or it may have been retrieved from the real-time Midi event that activated the current note using the notnum opcode. |
Examples
Here is an example of the octmidi opcode. Play octmidi.csd
Example 673. Example of the octmidi 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 MIDI in -odac -iadc -d -M0 ;;;RT audio I/O with MIDI in ; For Non-realtime ouput leave only the line below: ; -o octmidi.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 kr = 4410 ksmps = 10 nchnls = 1 ; Instrument #1. instr 1 ; This example expects MIDI note inputs on channel 1 i1 octmidi print i1 endin </CsInstruments> <CsScore> ;Dummy f-table to give time for real-time MIDI events f 0 8000 e </CsScore> </CsoundSynthesizer>