def stereo_pan():
synth = WaveSynth()
# panning a stereo source:
wave = Sample("samples/SOS 020.wav").clip(
6, 12).normalize().fadein(0.5).fadeout(0.5).lock()
osc = Sine(0.4)
panning = wave.copy().pan(lfo=osc).fadeout(0.2)
with Output.for_sample(panning) as out:
out.play_sample(panning)
# panning a generated mono source:
fm = Sine(0.5, 0.1999, bias=0.2)
wave = synth.triangle(220, 5, fm_lfo=fm).lock()
osc = Sine(0.4)
panning = wave.copy().pan(lfo=osc).fadeout(0.2)
with Output.for_sample(panning) as out:
out.play_sample(panning)
def pwm():
from matplotlib import pyplot as plot
synth = WaveSynth(samplerate=1000)
pwm_lfo = Sine(0.05, amplitude=0.49, bias=0.5, samplerate=synth.samplerate)
s1 = synth.pulse(4, amplitude=0.6, duration=20, pwm_lfo=pwm_lfo)
plot.figure(figsize=(16, 4))
plot.title("Pulse width modulation")
plot.ylim([-35000, 35000])
plot.plot(s1.get_frame_array())
plot.show()
with Output(nchannels=1) as out:
synth = WaveSynth()
lfo2 = Sine(0.2, amplitude=0.48, bias=0.5)
s1 = synth.pulse(440 / 6,
amplitude=0.5,
duration=6,
fm_lfo=None,
pwm_lfo=lfo2)
out.play_sample(s1)
def lfo_func():
rate = 1000
s = Sine(1, amplitude=100, bias=40, samplerate=rate)
s = AbsFilter(s)
s = ClipFilter(s, minimum=20, maximum=80)
s = DelayFilter(s, 0.5)
s = iter(s)
s = [next(s) for _ in range(rate * 2)]
import matplotlib.pyplot as plot
a = plot.subplot(111)
a.set_ylim([-50, 100])
a.plot(s)
plot.show()
def echo_lfo():
synth = WaveSynth(22050)
s = Sine(440, amplitude=25000, samplerate=synth.samplerate)
s = EnvelopeFilter(s, .2, .2, 0, 0, 1.5, stop_at_end=True)
s = EchoFilter(s, .15, 5, 0.3, 0.6)
s = ClipFilter(s, -32000, 32000)
frames = [int(v) for v in s]
import matplotlib.pyplot as plot
plot.plot(frames)
plot.show()
samp = Sample.from_array(frames, synth.samplerate, 1)
with Output.for_sample(samp) as out:
out.play_sample(samp)
def filter(self, source):
wave = self.input_waveform.get()
freq = self.input_rate.get()
amp = self.input_depth.get() / 2.0
samplerate = self.gui.synth.samplerate
bias = 1.0 - amp
if amp == 0.0 or freq == 0.0 or wave in (None, "", "<none>", "<off>"):
return source
if wave == "sine":
modulator = Sine(freq, amp, bias=bias, samplerate=samplerate)
elif wave == "triangle":
modulator = Triangle(freq, amp, bias=bias, samplerate=samplerate)
elif wave == "sawtooth":
modulator = SawtoothH(freq, 9, amp, bias=bias, samplerate=samplerate)
elif wave == "square":
modulator = SquareH(freq, 9, amp, bias=bias, samplerate=samplerate)
return AmpMudulationFilter(source, iter(modulator))
def modulate_amp():
from matplotlib import pyplot as plot
synth = WaveSynth()
freq = 220
s1 = synth.triangle(freq, duration=2)
m = synth.sine(2, duration=2, amplitude=0.4, bias=0.5)
s1.modulate_amp(m)
plot.title("Amplitude modulation by another waveform")
plot.plot(s1.get_frame_array())
plot.show()
with Output(nchannels=1) as out:
out.play_sample(s1)
s1 = synth.triangle(freq, duration=2)
m = Sine(3, amplitude=0.4, bias=0.5)
s1.modulate_amp(m)
plot.title("Amplitude modulation by an oscillator")
plot.plot(s1.get_frame_array())
plot.show()
with Output(nchannels=1) as out:
out.play_sample(s1)
def fm():
synth = WaveSynth(samplerate=8000)
from matplotlib import pyplot as plot
freq = 2000
lfo1 = Sine(1, amplitude=0.4, samplerate=synth.samplerate)
s1 = synth.sine(freq, duration=3, fm_lfo=lfo1)
plot.title("Spectrogram")
plot.ylabel("Freq")
plot.xlabel("Time")
plot.specgram(s1.get_frame_array(),
Fs=synth.samplerate,
noverlap=90,
cmap=plot.cm.gist_heat)
plot.show()
with Output(nchannels=1, samplerate=22050) as out:
synth = WaveSynth(samplerate=22050)
freq = 440
lfo1 = Linear(5, samplerate=synth.samplerate)
lfo1 = EnvelopeFilter(lfo1, 1, 0.5, 0.5, 0.5, 1)
s1 = synth.sine(freq, duration=3, fm_lfo=lfo1)
s_all = s1.copy()
out.play_sample(s1)
lfo1 = Sine(1, amplitude=0.2, samplerate=synth.samplerate)
s1 = synth.sine(freq, duration=2, fm_lfo=lfo1)
s_all.join(s1)
out.play_sample(s1)
lfo1 = Sine(freq / 17, amplitude=0.5, samplerate=synth.samplerate)
s1 = synth.sine(freq, duration=2, fm_lfo=lfo1)
s_all.join(s1)
out.play_sample(s1)
lfo1 = Sine(freq / 6, amplitude=0.5, samplerate=synth.samplerate)
s1 = synth.sine(freq, duration=2, fm_lfo=lfo1)
s_all.join(s1)
out.play_sample(s1)
lfo1 = Sine(1, amplitude=0.4, samplerate=synth.samplerate)
s1 = synth.triangle(freq, duration=2, fm_lfo=lfo1)
s_all.join(s1)
out.play_sample(s1)
freq = 440 * 2
lfo1 = Sine(freq / 80, amplitude=0.4, samplerate=synth.samplerate)
s1 = synth.triangle(freq, duration=2, fm_lfo=lfo1)
s_all.join(s1)
out.play_sample(s1)
def make_sample(freq):
fmfm = Linear(0, 0.002, max_value=99999)
fm = Sine(0.05, amplitude=0.5, fm_lfo=fmfm)
s1 = synth.sawtooth(freq, duration, amplitude=0.6, fm_lfo=fm)
s1.envelope(0.01, 0.1, 0.6, 2)
return s1
def osc_bench():
rate = 44100
duration = 2.0
def get_values(osc):
oscv = iter(osc)
values = [next(oscv) for _ in range(int(rate * duration))]
fm = FastSine(220)
print("GENERATING {:g} SECONDS SAMPLE DATA {:d} HZ USING LFO.".format(
duration, rate))
print(" WAVEFORM: with-FM / no-FM / optimized")
# sine
print(" Sine: ", end="")
start = time.time()
get_values(Sine(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(Sine(440))
duration2 = time.time() - start
start = time.time()
get_values(FastSine(440))
duration3 = time.time() - start
print("{:.3f} / {:.3f} / {:.3f}".format(duration1, duration2, duration3))
# triangle
print(" Triangle: ", end="")
start = time.time()
get_values(Triangle(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(Triangle(440))
duration2 = time.time() - start
start = time.time()
get_values(FastTriangle(440))
duration3 = time.time() - start
print("{:.3f} / {:.3f} / {:.3f}".format(duration1, duration2, duration3))
# square
print(" Square: ", end="")
start = time.time()
get_values(Square(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(Square(440))
duration2 = time.time() - start
start = time.time()
get_values(FastSquare(440))
duration3 = time.time() - start
print("{:.3f} / {:.3f} / {:.3f}".format(duration1, duration2, duration3))
# sawtooth
print(" Sawtooth: ", end="")
start = time.time()
get_values(Sawtooth(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(Sawtooth(440))
duration2 = time.time() - start
start = time.time()
get_values(FastSawtooth(440))
duration3 = time.time() - start
print("{:.3f} / {:.3f} / {:.3f}".format(duration1, duration2, duration3))
# pulse
print(" Pulse: ", end="")
start = time.time()
get_values(Pulse(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(Pulse(440))
duration2 = time.time() - start
start = time.time()
get_values(FastPulse(440))
duration3 = time.time() - start
print("{:.3f} / {:.3f} / {:.3f}".format(duration1, duration2, duration3))
# square_h
print(" Square_H: ", end="")
start = time.time()
get_values(SquareH(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(SquareH(440))
duration2 = time.time() - start
print("{:.3f} / {:.3f}".format(duration1, duration2))
print("Sawtooth_H: ", end="")
start = time.time()
get_values(SawtoothH(440, fm_lfo=fm))
duration1 = time.time() - start
start = time.time()
get_values(SawtoothH(440))
duration2 = time.time() - start
print("{:.3f} / {:.3f}".format(duration1, duration2))
print(" Noise: ", end="")
start = time.time()
get_values(WhiteNoise())
duration1 = time.time() - start
print(" {:.3f}".format(duration1))
print(" Linear: ", end="")
start = time.time()
get_values(Linear(0, 0.0001))
duration1 = time.time() - start
print(" {:.3f}".format(duration1))
