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declare name "phasemod -- phase modulation synth";
declare author "Albert Graef";
declare version "1.0";
import("music.lib");
// control variables
// master volume and pan
vol = hslider("vol", 0.3, 0, 10, 0.01); // %
pan = hslider("pan", 0.5, 0, 1, 0.01); // %
// ADSR envelop
attack = hslider("attack", 0.01, 0, 1, 0.001); // sec
decay = hslider("decay", 0.3, 0, 1, 0.001); // sec
sustain = hslider("sustain", 0.5, 0, 1, 0.01); // %
release = hslider("release", 0.2, 0, 1, 0.001); // sec
// voice parameters
freq = nentry("freq", 440, 20, 20000, 1); // Hz
gain = nentry("gain", 1, 0, 10, 0.01); // %
gate = button("gate"); // 0/1
// generic table-driven oscillator with phase modulation
// n = the size of the table, must be a power of 2
// f = the wave function, must be defined on the range [0,2*PI]
// freq = the desired frequency in Hz
// mod = the phase modulation signal, in radians
tblosc(n,f,freq,mod) = (1-d)*rdtable(n,waveform,i&(n-1)) +
d*rdtable(n,waveform,(i+1)&(n-1))
with {
waveform = time*(2.0*PI)/n : f;
phase = freq/SR : (+ : decimal) ~ _;
modphase = decimal(phase+mod/(2*PI))*n;
i = int(floor(modphase));
d = decimal(modphase);
};
// phase modulation synth (sine modulated by another sine)
smooth(c) = *(1-c) : +~*(c);
process = tblosc(1<<16, sin, freq, mod) * env * (gain:smooth(0.999))
: vgroup("2-master", *(vol) : panner(pan))
with {
env = gate : vgroup("1-adsr", adsr(attack, decay, sustain, release));
mod = 2*PI*tblosc(1<<16, sin, freq, 0)*env;
};
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