polyaft — Returns the polyphonic after-touch pressure of the selected note number.
polyaft returns the polyphonic pressure of the selected note number, optionally mapped to an user-specified range.
inote -- note number. Normally set to the value returned by notnum
ilow (optional, default: 0) -- lowest output value
ihigh (optional, default: 127) -- highest output value
Here is an example of the polyaft opcode. It uses the file polyaft.csd.
Do not forget that you must include the -F flag when using an external MIDI file like “polyaft.mid”.
Example 776. Example of the polyaft 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 polyaft.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 10 nchnls = 1 massign 1, 1 itmp ftgen 1, 0, 1024, 10, 1 ; sine wave instr 1 kcps cpsmidib 2 ; note frequency inote notnum ; note number kaft polyaft inote, 0, 127 ; aftertouch ; interpolate aftertouch to eliminate clicks ktmp phasor 40 ktmp trigger 1 - ktmp, 0.5, 0 kaft tlineto kaft, 0.025, ktmp ; map to sine curve for crossfade kaft = sin(kaft * 3.14159 / 254) * 22000 asnd oscili kaft, kcps, 1 out asnd endin </CsInstruments> <CsScore> t 0 120 f 0 9 2 -2 0 e </CsScore> </CsoundSynthesizer>