101 lines
2.3 KiB
Python
101 lines
2.3 KiB
Python
|
import random
|
||
|
|
import audiocore
|
||
|
|
import synthio
|
||
|
|
from ulab import numpy as np
|
||
|
|
import wave
|
||
|
|
|
||
|
|
SAMPLE_SIZE = 1024
|
||
|
|
VOLUME = 14700
|
||
|
|
sine = np.array(
|
||
|
|
np.sin(np.linspace(0, 2 * np.pi, SAMPLE_SIZE, endpoint=False)) * VOLUME,
|
||
|
|
dtype=np.int16,
|
||
|
|
)
|
||
|
|
|
||
|
|
envelope = synthio.Envelope(
|
||
|
|
attack_time=0.1, decay_time=0.05, release_time=0.2, attack_level=1, sustain_level=0.8
|
||
|
|
)
|
||
|
|
|
||
|
|
synth = synthio.Synthesizer(sample_rate=48000)
|
||
|
|
|
||
|
|
|
||
|
|
def synthesize(synth):
|
||
|
|
random.seed(3)
|
||
|
|
target_notes = [synthio.midi_to_hz(n + o) for n in (60, 64, 67, 70) for o in (-12, 12, 0)]
|
||
|
|
print(target_notes)
|
||
|
|
notes = [
|
||
|
|
synthio.Note(frequency=random.randint(60, 20000), waveform=sine, envelope=envelope)
|
||
|
|
for note in target_notes
|
||
|
|
]
|
||
|
|
synth.press(notes)
|
||
|
|
target = synthio.midi_to_hz(72)
|
||
|
|
factor = 0.98
|
||
|
|
for i in range(600):
|
||
|
|
yield 1
|
||
|
|
for ni, ti in zip(notes, target_notes):
|
||
|
|
print(ni.frequency, ti)
|
||
|
|
break
|
||
|
|
for ni, ti in zip(notes, target_notes):
|
||
|
|
ni.frequency = (ni.frequency * factor) + (ti * (1 - factor))
|
||
|
|
synth.release_all()
|
||
|
|
yield 36
|
||
|
|
|
||
|
|
|
||
|
|
def synthesize2(synth):
|
||
|
|
n = synthio.Note(
|
||
|
|
frequency=synthio.midi_to_hz(60),
|
||
|
|
tremolo_depth=0.2,
|
||
|
|
tremolo_rate=2,
|
||
|
|
waveform=sine,
|
||
|
|
envelope=envelope,
|
||
|
|
)
|
||
|
|
synth.press((n,))
|
||
|
|
yield 360
|
||
|
|
synth.release_all()
|
||
|
|
yield 36
|
||
|
|
|
||
|
|
|
||
|
|
def synthesize3(synth):
|
||
|
|
n = synthio.Note(
|
||
|
|
frequency=synthio.midi_to_hz(60),
|
||
|
|
vibrato_depth=0.1,
|
||
|
|
vibrato_rate=8,
|
||
|
|
waveform=sine,
|
||
|
|
envelope=envelope,
|
||
|
|
)
|
||
|
|
synth.press((n,))
|
||
|
|
yield 360
|
||
|
|
synth.release_all()
|
||
|
|
yield 36
|
||
|
|
|
||
|
|
|
||
|
|
def synthesize4(synth):
|
||
|
|
n = synthio.Note(
|
||
|
|
frequency=synthio.midi_to_hz(60),
|
||
|
|
tremolo_depth=0.1,
|
||
|
|
tremolo_rate=1.5,
|
||
|
|
vibrato_depth=0.1,
|
||
|
|
vibrato_rate=3,
|
||
|
|
waveform=sine,
|
||
|
|
envelope=envelope,
|
||
|
|
)
|
||
|
|
synth.press((n,))
|
||
|
|
yield 720
|
||
|
|
synth.release_all()
|
||
|
|
yield 36
|
||
|
|
|
||
|
|
|
||
|
|
def chain(*args):
|
||
|
|
for a in args:
|
||
|
|
yield from a
|
||
|
|
|
||
|
|
|
||
|
|
# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
|
||
|
|
with wave.open("tune-noenv.wav", "w") as f:
|
||
|
|
f.setnchannels(1)
|
||
|
|
f.setsampwidth(2)
|
||
|
|
f.setframerate(48000)
|
||
|
|
for n in chain(synthesize2(synth), synthesize3(synth), synthesize4(synth)):
|
||
|
|
for i in range(n):
|
||
|
|
result, data = audiocore.get_buffer(synth)
|
||
|
|
f.writeframes(data)
|