STKPercFlut — STKPercFlut is a percussive flute FM synthesis instrument.
STKPercFlut is a percussive flute FM synthesis instrument. The instrument uses an algorithm like the algorithm 4 of the TX81Z.
asignal STKPercFlut ifrequency, iamplitude, [kc1, kv1[, kc2, kv2[, kc3, kv3[, kc4, kv4[, kc5, kv5]]]]]
ifrequency -- Frequency of note played, in Hertz.
iamplitude -- Amplitude of note played (range 0-1).
kc1, kv1, kc2, kv2, kc3, kv3, kc4, kv4, kc5, kv5, kc6, kv6, kc7, kv7, kc8, kv8 -- Up to 8 optional k-rate controller pairs for the STK opcodes. Each controller pair consists of a controller number (kc) followed by a controller value (kv). The 5 controller numbers and values that work for STKPercFlut are:
kc, kv -- 2, total modulator index.
kc, kv -- 4, crossfade of modulator.
kc, kv -- 11, speed of low-frequency oscillator.
kc, kv -- 1, depth of low-frequency oscillator.
kc, kv -- 128, ADSR 2 and 4 target.
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Note |
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The code for this opcode is taken directly from the PercFlut class in the Synthesis Toolkit in C++ by Perry R. Cook and Gary P. Scavone. More on the STK classes can be found here: https://ccrma.stanford.edu/software/stk/classes.html |
Here is an example of the STKPercFlut opcode. It uses the file STKPercFlut.csd, and fwavblnk.aiff.
Example 565. Example of the STKPercFlut opcode.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;RT audio out ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o STKPercFlut.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ifrq = p4 kndx line p5, p3, p6 ;Total Modulator Index kfad line p7, p3, 0 ;Modulator Crossfade asig STKPercFlut cpspch(ifrq), 1, 2, kndx, 4, kfad, 11, 0, 1, 100, 128, 40 outs asig, asig endin </CsInstruments> <CsScore> i 1 0 7 8.05 100 0 100 i 1 3 7 9.03 20 120 0 i 1 3 .5 8.05 20 120 0 i 1 4 .5 9.09 20 120 0 i 1 5 3 9.00 20 120 0 e </CsScore> </CsoundSynthesizer>