STKSimple — STKSimple is a wavetable/noise instrument.
STKSimple is a wavetable/noise instrument. It combines a looped wave, a noise source, a biquad resonance filter, a one-pole filter, and an ADSR envelope to create some interesting sounds.
asignal STKSimple ifrequency, iamplitude, [kpos, kv1[, kcross, kv2[, kenv, kv3[, kgain, kv4]]]]
ifrequency -- Frequency of note played, in Hertz.
iamplitude -- Amplitude of note played (range 0-1).
kpos -- controller 2, position of filter pole. Value range of kv1 is 0-127.
kcross -- controller 4, noise/pitched cross-fade. Value range of kv2 is 0-127.
kenv -- controller 11, rate of envelope. Value range of kv3 is 0-127.
kgain -- controller 128, gain. Value range of kv4 is 0-127.
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The code for this opcode is taken directly from the Simple 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 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). Both the controller numbers and the controller values are krate variables. However, during a performance, normally the controller numbers stay fixed while the corresponding controller values may change at any time. The order of the controller pair is arbitrary, as long as they are after iamplitude. Also, it is not needed that all controller pairs are used. |
Here is an example of the STKSimple opcode. It uses the file STKSimple.csd.
Example 865. Example of the STKSimple opcode.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o STKSimple.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ifrq = p4 kv1 line p5, p3, p6 ;Filter Pole Position kv2 line 20, p3, 90 ;Noise/Pitched Cross-Fade asig STKSimple cpspch(p4), 1, 2, kv1, 4, kv2, 11, 10, 128, 120 outs asig, asig endin </CsInstruments> <CsScore> i 1 0 5 7.00 100 0 i 1 + . 7.05 10 127 i 1 + . 8.03 100 0 i 1 + . 5.00 10 10 e </CsScore> </CsoundSynthesizer>