64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
|
import sys
|
||
|
|
|
||
|
|
sys.path.insert(
|
||
|
|
0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
|
||
|
|
)
|
||
|
|
|
||
|
|
import random
|
||
|
|
import audiocore
|
||
|
|
import synthio
|
||
|
|
from ulab import numpy as np
|
||
|
|
import adafruit_wave as wave
|
||
|
|
|
||
|
|
random.seed(9)
|
||
|
|
|
||
|
|
envelope = synthio.Envelope(
|
||
|
|
attack_time=0, decay_time=0, release_time=0, attack_level=0.8, sustain_level=1.0
|
||
|
|
)
|
||
|
|
|
||
|
|
SAMPLE_SIZE = 1024
|
||
|
|
VOLUME = 14700
|
||
|
|
sine = np.array(
|
||
|
|
np.sin(np.linspace(0, 2 * np.pi, SAMPLE_SIZE, endpoint=False)) * VOLUME,
|
||
|
|
dtype=np.int16,
|
||
|
|
)
|
||
|
|
noise = np.array([random.randint(-VOLUME, VOLUME) for i in range(SAMPLE_SIZE)], dtype=np.int16)
|
||
|
|
bend_out = np.linspace(0, 32767, num=SAMPLE_SIZE, endpoint=True, dtype=np.int16)
|
||
|
|
|
||
|
|
|
||
|
|
def synthesize(synth):
|
||
|
|
for waveform in (sine, None, noise):
|
||
|
|
for biquad in (
|
||
|
|
None,
|
||
|
|
synth.low_pass_filter(330),
|
||
|
|
synth.low_pass_filter(660),
|
||
|
|
synth.high_pass_filter(330),
|
||
|
|
synth.high_pass_filter(660),
|
||
|
|
synth.band_pass_filter(330),
|
||
|
|
synth.band_pass_filter(660),
|
||
|
|
):
|
||
|
|
n = synthio.Note(
|
||
|
|
frequency=80,
|
||
|
|
envelope=envelope,
|
||
|
|
filter=biquad,
|
||
|
|
waveform=waveform,
|
||
|
|
bend=synthio.LFO(bend_out, once=True, rate=1 / 2, scale=5),
|
||
|
|
)
|
||
|
|
|
||
|
|
synth.press(n)
|
||
|
|
print(synth, n)
|
||
|
|
yield 2 * 48000 // 256
|
||
|
|
synth.release_all()
|
||
|
|
yield 36
|
||
|
|
|
||
|
|
|
||
|
|
with wave.open("biquad.wav", "w") as f:
|
||
|
|
f.setnchannels(1)
|
||
|
|
f.setsampwidth(2)
|
||
|
|
f.setframerate(48000)
|
||
|
|
synth = synthio.Synthesizer(sample_rate=48000)
|
||
|
|
for n in synthesize(synth):
|
||
|
|
for i in range(n):
|
||
|
|
result, data = audiocore.get_buffer(synth)
|
||
|
|
f.writeframes(data)
|