/
frank.py
55 lines (41 loc) · 1.64 KB
/
frank.py
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from pippi import dsp, wavetables, tune, oscs, interpolation
import random
sr = 44.1
numlayers = 20
speeds = []
degrees = [1,3,5,6,9]
scale = tune.major
for i, d in enumerate(degrees):
register = d // (len(scale) + 1)
scale_index = scale[(d-1) % len(scale)]
ratio = tune.terry[scale_index]
speeds += [ (ratio[0] / ratio[1]) * 2**register ]
def makelayer(speeds):
snd = dsp.read('harps/harp_006.wav')
length = int(60 * 1000 * sr) * 2
out = dsp.buffer(length=1)
speed = random.choice(speeds) * random.choice([0.125, 0.25, 0.5, 1])
s = snd.speed(speed)
panpos = random.random()
pulselength = int(random.triangular(1, 80) * sr)
numpulses = length // pulselength
tablesize = numpulses // 100
ptable = interpolation.linear([ random.random() for _ in range(tablesize) ], numpulses)
ftable = wavetables.window('line', numpulses)
print('rendering speed: %s pan: %s len: %s num: %s' % (speed, panpos, pulselength, numpulses))
osc = oscs.Osc(wavetable='tri')
for i in range(numpulses-1):
start = ptable[i] * len(s) - pulselength
bit1 = s.cut(start if start > 0 else 0, pulselength)
#bit2 = osc.play(length=pulselength, freq=100 * (ftable[i] + 1), amp=0.5)
#bit1 = bit1 * bit2
bit1 = bit1.env('sine')
out.dub(bit1.pan(panpos) * 0.5, i * (pulselength//2))
print('done speed: %s pan: %s len: %s num: %s' % (speed, panpos, pulselength, numpulses))
return out
layers = dsp.pool(makelayer, [(speeds,) for _ in range(numlayers)])
out = dsp.buffer(length=1)
for layer in layers:
out.dub(layer, 0)
print(len(layers), len(out))
out.write('frank.wav')