def demo_song():
synth = WaveSynth()
notes = {note: key_freq(49+i) for i, note in enumerate(['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'])}
tempo = 0.3
def synth_sample(freq, duration):
harmonics = [(1, 1), (2, 1/2), (4, 1/4), (6, 1/6)]
a = synth.harmonics(freq, duration, harmonics)
return a.envelope(0.05, 0.2, 0.8, 0.5)
silence = Sample.from_array([0]*int(synth.samplerate*tempo*2), synth.samplerate, numchannels=1)
song = "A A B. A D. C#.. ; A A B. A E. D.. ; A A A. F#.. D C#.. B ; G G F#.. D E D ; ; "\
"A A B. A D C#.. ; A A B. A E D. ; A A A. F#.. D C#.. B ; G G F#.. D E D ; ; "
with Output(synth.samplerate, synth.samplewidth, 1, mixing="sequential", queue_size=50) as out:
for note in song.split():
if note == ";":
print()
out.play_sample(silence)
continue
print(note, end=" ", flush=True)
if note.endswith(".."):
sample = synth_sample(notes[note[:-2]], tempo*4)
elif note.endswith("."):
sample = synth_sample(notes[note[:-1]], tempo*2)
else:
sample = synth_sample(notes[note], tempo)
out.play_sample(sample)
print()
out.wait_all_played()
def generate_sample(self, oscillator, duration, use_fade=False):
scale = 2**(8*self.synth.samplewidth-1)
try:
frames = [int(v*scale) for v in itertools.islice(oscillator, int(self.synth.samplerate*duration))]
except StopIteration:
return None
else:
sample = Sample.from_array(frames, self.synth.samplerate, 1)
if use_fade:
sample.fadein(0.05).fadeout(0.1)
return sample
def chunked_frame_data(self, chunksize, repeat=False, stopcondition=lambda: False):
played_duration = 0.0
num_frames = chunksize // self.samplewidth // self.nchannels
scale = 2 ** (8 * self.samplewidth - 1)
while played_duration < self.max_play_duration:
try:
frames = [int(v * scale) for v in itertools.islice(self.oscillator, num_frames)]
except StopIteration:
break
else:
sample = Sample.from_array(frames, self.samplerate, 1)
yield sample.view_frame_data()
played_duration += num_frames / self.samplerate
def generate_sample(self, oscillator: Oscillator, duration: float, use_fade: bool = False) -> Optional[Sample]:
scale = 2**(8*self.synth.samplewidth-1)
blocks = oscillator.blocks()
try:
sample_blocks = list(next(blocks) for _ in range(int(self.synth.samplerate*duration/params.norm_osc_blocksize)))
float_frames = sum(sample_blocks, [])
frames = [int(v*scale) for v in float_frames]
except StopIteration:
return None
else:
sample = Sample.from_array(frames, self.synth.samplerate, 1)
if use_fade:
sample.fadein(0.05).fadeout(0.1)
return sample
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)
out.wait_all_played()
def chunked_frame_data(self, chunksize, repeat=False, stopcondition=lambda: False):
num_frames = chunksize // self.samplewidth // self.nchannels
if num_frames != params.norm_osc_blocksize:
raise ValueError("streaming osc num_frames must be equal to the oscillator blocksize")
played_duration = 0.0
scale = 2 ** (8 * self.samplewidth - 1)
while played_duration < self.max_play_duration:
try:
frames = [int(v * scale) for v in next(self.blocks)]
except StopIteration:
break
else:
sample = Sample.from_array(frames, self.samplerate, 1)
yield sample.view_frame_data()
played_duration += num_frames / self.samplerate
def demo_song(profiling=False):
synth = WaveSynth()
notes = {note: key_freq(49+i) for i, note in enumerate(['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'])}
tempo = 0.3
def instrument(freq, duration):
harmonics = [(1, 1), (2, 1/2), (4, 1/4), (6, 1/6)]
a = synth.harmonics(freq, duration, harmonics)
return a.envelope(0.05, 0.2, 0.8, 0.5)
print("Synthesizing tones...")
perf_c = time.perf_counter()
quarter_notes = {note: instrument(notes[note], tempo) for note in notes}
half_notes = {note: instrument(notes[note], tempo*2) for note in notes}
full_notes = {note: instrument(notes[note], tempo*4) for note in notes}
silence = Sample.from_array([0]*int(synth.samplerate*tempo*2), synth.samplerate, numchannels=1)
if profiling:
print(time.perf_counter()-perf_c)
else:
song = "A A B. A D. C#.. ; A A B. A E. D.. ; A A A. F#.. D C#.. B ; G G F#.. D E D ; ; "\
"A A B. A D C#.. ; A A B. A E D. ; A A A. F#.. D C#.. B ; G G F#.. D E D ; ; "
with Output(synth.samplerate, synth.samplewidth, 1, mixing="sequential") as out:
for note in song.split():
if note == ";":
print()
out.play_sample(silence)
continue
print(note, end=" ", flush=True)
if note.endswith(".."):
sample = full_notes[note[:-2]]
elif note.endswith("."):
sample = half_notes[note[:-1]]
else:
sample = quarter_notes[note]
out.play_sample(sample)
print()
out.wait_all_played()
