STKBlowBotl — STKBlowBotl uses a helmholtz resonator (biquad filter) with a polynomial jet excitation.
This opcode implements a helmholtz resonator (biquad filter) with a polynomial jet excitation (a la Cook).
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 4 controller numbers and values that work for STKBlowBotl are:
kc, kv -- 4, gain of noise.
kc, kv -- 11, speed of low-frequency oscillator.
kc, kv -- 1, depth of low-frequency oscillator.
kc, kv -- 128, volume
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The code for this opcode is taken directly from the BlowBotl 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 STKBlowBotl opcode. It uses the file STKBlowBotl.csd.
Example 766. Example of the STKBlowBotl 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 STKBlowBotl.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ipch = p4 knoise line p5, p3, p6 ;noise kvol line 100, p3, 70 ;volume asig STKBlowBotl cpspch(ipch), 1, 4, knoise, 11, 10, 1, 50, 128, kvol asig = asig * .7 ;too loud outs asig, asig endin </CsInstruments> <CsScore> i 1 0 2 9.00 20 100 i 1 + 3 8.03 120 0 e </CsScore> </CsoundSynthesizer>