def test_implicit_add_channel():
s = Sine() #[0:2]
#s[0] += 0.4*Triangle(duration=6e3) # exceeding signal bounds in time
s[2] = 0.2 * Triangle() # channels it into mono channel with empty R
#print(s)
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, test_implicit_add_channel)
def to_infinity_curve_test():
c = Line(-80, -10, 10e3)
p = Line(-100, 100, 5e3)
#s = Sine(duration=20e3)*Gain(c)
s = Sine(duration=10e3) * Pan(p)
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, to_infinity_curve_test)
def curve_continuity_test():
c = Line(220, 330, 4e3) | Constant(330, 4e3)
s = Sine(frequency=c, duration=8e3)
c2 = Constant(220, 2e3) | Line(220, 330, 9e3) | Constant(330, 2e3)
s = Sine(frequency=c2, duration=18e3)
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def lowpass_FIR_test():
#s = WAV(african)[10e3:20e3]*LowPassBasic(cutoff=880, width=100)
c = Line(55, 110, 3e3) | Constant(110, 2e3)
c |= Line(110, 220, 3e3) | Constant(220, 2e3)
c |= Line(220, 440, 3e3) | Constant(440, 2e3)
c |= Line(440, 880, 3e3) | Constant(880, 2e3)
s = Sine(frequency=c, duration=20e3)[0:2]
s[1] *= LowPassBasic(cutoff=330, width=100)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
def after_test_1():
signal = Sine(frequency=midC(-7), duration=6e3)
s2 = Signal.concat(
*[Sine(frequency=midC(k - 4), duration=1e3) for k in range(6)])
signal += s2
print(signal)
audio = signal.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio, is_wait=True)
def after_test_2():
# test ** as repeat
s = Signal.concat(Sine(midC(-7 + 12), 1e3), Sine(midC(-3), 1e3),
Sine(midC(-8 + 12), 1e3), Sine(midC(-1), 1e3))
s **= 5
s += WAV(african)
print(s)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio, is_wait=True)
def envelope_test():
env = lambda n: (n / 1000) if n < 1000 else (0.5 + np.sin(2 * np.pi * 2 * n
/ 1000) / 2)
env = lambda n: (0.5 + np.sin(2 * np.pi * 2 * n) / 2)
env = lambda n: (0 if n == 0 else np.sin(n) * (min(n, 1)))
env = lambda n: np.e**(-3 + 3 * (min(n, 3)) / 3)
wav = Sine(duration=5000) * Amplitude(env)
audio = wav.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.03)
play_Audio(audio, is_wait=True)
def Butterworth_test():
#s = WAV(african)[10e3:20e3]
c = Line(55, 110, 3e3) | Constant(110, 2e3)
c |= Line(110, 220, 3e3) | Constant(220, 2e3)
c |= Line(220, 440, 3e3) | Constant(440, 2e3)
c |= Line(440, 880, 3e3) | Constant(880, 2e3)
c |= Line(880, 2 * 880, 3e3) | Constant(2 * 880, 2e3)
s = Sine(frequency=c, duration=20e3)[0:2]
s[1] *= Butterworth(cutoff=880)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def pan_test():
seconds = 10
t = Sine(frequency=230,
duration=seconds * 1000)[0:2] #*SineAM(frequency=1, size=0.2)
top = seconds * 11025
pans = (lambda x: np.log(1 + (np.e - 1) * (top - x) / top),
lambda x: np.log(1 + (np.e - 1) * x / top))
#t *= Pan(*pans) # not relevant for new Pan
audio = t.mixdown(sample_rate=11025, byte_width=2)
play_Audio(audio, is_wait=True)
def test_gain_dB():
s = Signal()
for i in range(10):
s |= Sine(duration=1e3) * Gain(-6 * i)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def concat_overload_test():
#s = Sine(frequency=250, duration=2e3) | Triangle(frequency=300, duration=3e3)
s = WAV(african)
s = s[5e3:5.5e3] | s[6e3:6.8e3] | s[11e3:13e3] * Reverse() + Sine(
frequency=300, duration=2e3) | s[9e3:10.8e3]
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def melody_test():
step = 500
notes = (midC(0), midC(-3), midC(-7), midC(4), midC(7), midC(-1), midC(2))
t = sum([
Sine(frequency=f, duration=step + 100) *
Fade(is_in=True, duration=step * 5) *
Fade(is_in=False, duration=step + 100) * Shift(duration=(1 + i) * step)
for (i, f) in enumerate(notes)
])
audio = t.mixdown(sample_rate=11025, byte_width=2)
play_Audio(audio)
def after_test_3():
b1 = 1.2e3
b2 = 1e3
b3 = 0.8e3
b4 = 1.4e3
p1 = [-6, -3, -8, -1, 1]
p2 = [9, 4, 6, 8, 11]
p3 = [12 + 1, 12 + 4, 12 + 6, 12 + 8, 12 + 1, 12 + 3, 12 + 11]
p4 = [-12 + 2, -12 - 1, -12 + 1, -12 - 3]
s = Signal.concat(*[Sine(midC(p), b1) for p in p1])**5
s += 0.8 * Signal.concat(*[Sine(midC(p), b2) for p in p2])**6 * Shift(000)
s += 0.3 * Signal.concat(*[Sine(midC(p), b3) for p in p3])**6
s += 2 * Signal.concat(*[Sine(midC(p), b4) for p in p4])**5
s *= MovingAverage(11)
print(s)
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio, is_wait=False)
def simple_test(f=220, seconds=5):
t = 0.7 * Sine(frequency=230, duration=seconds * 1000) * SineAM(
frequency=1, size=0.2)[0:2]
t[1] += Triangle(frequency=380, duration=seconds * 1000) * SineAM(
frequency=0.4, size=0.3)
t[0] += Square(frequency=300, duration=seconds * 1000) * SineAM(
frequency=0.7, size=0.2)
t *= Fade(is_in=True, duration=3 * 1000)
#t *= Fade(is_in=False, duration=20)
t *= Shift(duration=1 * 1000)
play_Audio(t.mixdown())
def multichannel_test():
s = Sine(frequency=midC(1))
s[1] = Sine(frequency=midC(-3))
s[2] = Sine(frequency=midC(-7))
s[3] = Sine(frequency=midC(4))
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, multichannel_test)
def pan_mono_test2():
panMax = 100
panMin = -100
width = panMax - panMin
eps = 0.001
panLaw = -6 # -3 seems appropriate for headphones
time = 8e3
pan_shape = lambda x: np.log((x + panMax) /
(width)) # +0.1 to prevent log(0)
LdB = lambda x: (-panLaw / np.log(2)) * pan_shape(x)
RdB = lambda x: LdB(-x)
L = lambda t: LdB(width * t * 1000 / time + panMin)
R = lambda t: RdB(width * t * 1000 / time + panMin)
# =-===========
s = Sine(duration=10e3)[0:2]
s *= Gain(Curve(L, duration=time), Curve(R, duration=8e3))
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, pan_mono_test2)
def SweepTest(stay=0.5e3, step=0.5e3): # start at really low A
start = 55
octaves = 4
c = Constant(start, stay)
for octave in range(octaves):
c |= Line(start, start * semitone**4, step) | Constant(
start * semitone**4, stay)
start *= semitone**4
c |= Line(start, start * semitone**3, step) | Constant(
start * semitone**3, stay)
start *= semitone**3
c |= Line(start, start * semitone**5, step) | Constant(
start * semitone**5, stay)
start *= semitone**5
return Sine(frequency=c, duration=(step + stay) * 3 * octaves + stay)
def pan_mono_test3():
s = Sine(duration=2e3) * Pan(-100)
s |= Sine(duration=2e3) * Pan(0)
s |= Sine(duration=2e3) * Pan(100)
c = Line(-100, 100, 5e3) | Logistic(100, -100, duration=5e3)
s2 = Sine(duration=10e3) * Pan(c)
Pan.panLaw = -6
audio = s2.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
#play_Audio(audio)
export_test(audio, pan_mono_test3)
def channel_slice_test():
# series of tests
#s = WAV(african)[5e3:15e3]
# t = s[0]
# t = s[1,1e3:7e3]
# t = s[1e3:7e3]
#s[1] = 0.132*WhiteNoise(duration=10e3)#*Gain(-20)
#s[0,3e3:7e3] = s[1,2e3:6e3]
#s[0,1e3:6e3] += 0.13*Sine(frequency=midC(8))
#s[0,1e3:5e3] *= Reverse()
#s[1] = s[0]*Gain(-6)
# etc...
##########
s = 0.1 * Sine()
s[1] = WAV(african)[0, 5e3:15e3]
audio = s.mixdown(sample_rate=44100, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def s(f, duration):
return sum([
(1 / i**1.5) * Sine(frequency=f * i, duration=duration) * ADSR(
(0.01e3) * (i), 0.8, 0.5 + (1 / (i + 2)), 0.02e3)
for i in range(1, 20)
])
def test_to_stereo_syntax():
s = Sine()[0:2] # automatically casts into stereo
s[0] += 0.2 * Triangle(frequency=360)
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def pan_mono_test():
c = Constant(-100, 2.5e3) | Line(-100, 100, 5e3)
s = Sine(duration=10e3) * Pan(c)
audio = s.mixdown(sample_rate=11025, byte_width=2, max_amplitude=0.2)
play_Audio(audio)
def timing_test():
t = 0.7 * Sine(frequency=230, duration=3 * 1000) * SineAM(frequency=1,
size=0.2)[0:2]
t += Square(frequency=250, duration=3 * 1000) * Shift(duration=3 * 1000)
audio = t.mixdown(sample_rate=11025, byte_width=2)
play_Audio(audio, is_wait=True)
