def test_iDFT():
sample_rate = 11025
N = 100
sets = 100
duration = 1000
sines = (Sine(duration=duration) +
Sine(frequency=400, duration=duration)).mixdown(
sample_rate=sample_rate, byte_width=2)
freqs = [DFT(sines, N, start=i * N) for i in range(sets)]
#freqs = DFT(sines, N)
recycled = [iDFT(fs, sample_rate) for fs in freqs]
output = Audio(sample_rate=sample_rate)
for r in recycled:
output.append(r)
output.mixdown(byte_width=2, max_amplitude=None)
play_Audio(output)
