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from sndobj import SndObj, SndRTIO, HarmTable, Oscili, SND_OUTPUT
from scipy import zeros, pi, sin, float32
from pylab import plot, show
# ---------------------------------------------------------------------------
# Test PushIn
# Create 1 frame of a sine wave in a numpy array
sine = zeros(256, dtype=float32)
for i in range(sine.size):
sine[i] = 0.5 * sin((2 * pi * i) / sine.size)
sine *= 32768
obj = SndObj()
obj.PushIn(sine)
outp = SndRTIO(1, SND_OUTPUT)
outp.SetOutput(1, obj)
# Repeatedly output the 1 frame of sine wave
duration = outp.GetSr() * 2 # 2 seconds
i = 0
vector_size = outp.GetVectorSize()
while i < duration:
outp.Write()
i += vector_size
# ---------------------------------------------------------------------------
# Test PopOut
# copy a sine wave generated by a SndObj into a numpy array
output_size = 2048
harm = HarmTable(10000,1,1)
osc = Oscili(harm, 440, 10000)
output = zeros(output_size, dtype=float32)
duration = output_size # output_size samples
i = 0
vector_size = osc.GetVectorSize()
while i < duration:
osc.DoProcess()
osc.PopOut(output[i:i+vector_size])
i += vector_size
# plot the array
plot(output)
show()
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