STKTubeBell — STKTubeBell is a tubular bell (orchestral chime) FM synthesis instrument.
STKTubeBell is a tubular bell (orchestral chime) FM synthesis instrument. It uses two simple FM Pairs summed together, also referred to as algorithm 5 of the TX81Z.
asignal STKTubeBell 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 STKTubeBell are:
kc, kv -- 2, modulator index 1.
kc, kv -- 4, crossfade of outputs.
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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The code for this opcode is taken directly from the TubeBell 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 STKTubeBell opcode. It uses the file STKTubeBell.csd.
Example 787. Example of the STKTubeBell 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 STKTubeBell.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ifrq = p4 kfad line p6, p3, p7 ;Crossfade of Outputs kindx = p5 ;(FM) Modulator Index One asig STKTubeBell cpspch(p4), 1, 2, kindx, 4, kfad, 11, 10, 1, 70, 128,50 outs asig, asig endin </CsInstruments> <CsScore> i 1 0 2 7.05 0 100 100 i 1 + 4 9.00 127 127 30 i 1 + 1 10.00 127 12 30 i 1 + 3 6.08 127 1 100 e </CsScore> </CsoundSynthesizer>