STKWhistle — STKWhistle produces whistle sounds.
STKWhistle produces (police) whistle sounds. It uses a hybrid physical/spectral model of a police whistle (a la Cook).
asignal STKWhistle ifrequency, iamplitude, [kmod, kv1[, knoise, kv2[, kfipfreq, kv3[, kfipgain, kv4[, kvol, kv5]]]]]
ifrequency -- Frequency of note played, in Hertz.
iamplitude -- Amplitude of note played (range 0-1).
kmod -- controller 2, blowing frequency modulation. Value range of kv1 is 0-127.
knoise -- controller 4, noise gain. Value range of kv2 is 0-127.
kfipfreq -- controller 11, fipple modulation frequency. Value range of kv3 is 0-127.
kfipgain -- controller 1, fipple modulation gain. Value range of kv4 is 0-127.
kvol -- controller 128, volume. Value range of kv5 is 0-127.
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The code for this opcode is taken directly from the Whistle 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 STKWhistle opcode. It uses the file STKWhistle.csd.
Example 870. Example of the STKWhistle 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 STKWhistle.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 ;Blowing Frequency Modulation kv3 = p7 ;Fipple Modulation Frequency asig STKWhistle cpspch(p4), 1, 4, 20, 11, kv3, 1, 100, 2, kv1, 128, 127 asig = asig*.7 ;too loud outs asig, asig endin </CsInstruments> <CsScore> i 1 0 .5 9.00 100 30 30 i 1 1 3 9.00 100 0 20 i 1 4.5 . 9.00 1 0 100 e </CsScore> </CsoundSynthesizer>