def messy_random_concat_test():
s = WAV(african)
max_length = 20e3
def messy_track():
t = 0
temp = 0
while temp < max_length:
duration = 400 + np.random.random() * 3e3
temp += duration
start = 4e3 + (30 - 4) * np.random.random() * 1e3
t |= s[start:start + duration]
return t
L = messy_track() + messy_track()
R = messy_track() + messy_track()
s = L * Repan(0, None) + R * Repan(None, 1)
t = sum([(1 - 8 / 10) * s * Shift(duration=100 * x) *
MovingAverage(width=2 * x + 1) for x in range(5)])
t += 0.6 * s * Downsample(factor=5) * MovingAverage(width=5)
audio = t.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def log_amp_test():
# tests logarithmic scaling of amplitude factors
signal = WAV(african) * Repan(0, None) #switch L/R
signal += 0.125 * WAV(african) * Repan(None, 1)
audio = signal.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.5)
play_Audio(audio, is_wait=True)
pass
def reverse_phase_test():
s = WAV(african)
L = s[10e3:11e3] | -s[11e3:12e3] | s[12e3:13e3] | -s[13e3:14e3] | s[14e3:15e3] \
| -s[15e3:16e3] | s[16e3:17e3]
R = s[10e3:17e3]
s = L * Repan(0, None) + R * Repan(None, 1)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, reverse_phase_test)
def slice_set_test():
s = WAV(african)
# careful with 5e3, creates float slices
#s[5e3:18e3] = s[5e3:18e3]*Repan() + s[5e3:18e3]*Downsample(5)*Gain(-3)
#s[5e3:18e3] *= Repan(1,0)
s[5e3:18e3] = s[5e3:18e3] * Repan(1, None) + s[5e3:18e3] * Repan(None, 0)
# TODO found a bug here? does it really keep both copies of the slice separate?
# also test s = s[0:50] & sine() & s[50:100]
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def concat_scalar_test():
s = WAV(african)
gap = 0.03
L = s[10e3:11e3] | gap | s[11e3:12e3] | gap | s[12e3:13e3] | gap | s[13e3:14e3] \
| gap | s[14e3:15e3] | gap | s[15e3:16e3] | gap | s[16e3:24e3]
R = s[10e3:18e3] | gap | s[18e3:19e3] | gap | s[19e3:20e3] | gap | s[20e3:21e3] \
| gap | s[21e3:24e3]
s = L * Repan(0, None) + R * Repan(None, 1)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def cancellation_test():
#signal = Sine(duration=5000) - 0.999*Sine(duration=5000)
#signal += 0.01*Sine(frequency=130,duration=1000)
signal = WAV(african) - WAV(african) * Repan(1, 0)
#signal += 0.5*WAV(african) # basically neautralized the center "channel"
#signal += 5.0*WAV(african) # strengthens center
audio = signal.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio, is_wait=True)
def gain_test():
signal = WAV(african) * Repan(0, None)
signal += WAV(african) * Repan(None, 1) * Gain(-9)
audio = signal.mixdown(sample_rate=44100, byte_width=2, max_amplitude=None)
play_Audio(audio, is_wait=True)
def repan_test():
signal = WAV(african) * Repan(1, 0) #switch L/R
audio = signal.mixdown(sample_rate=44100, byte_width=2, max_amplitude=None)
play_Audio(audio, is_wait=True)
pass