2023-05-11 18:59:06 -05:00

105 lines
2.4 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=0.1, decay_time=0.05, release_time=0.2, attack_level=0.8, sustain_level=0.8
)
h = np.array(
[
-0.001229734800309099,
-0.008235561806605458,
-0.015082497016061390,
-0.020940136918319988,
-0.024981800822463429,
-0.026464233332370746,
-0.024803890156806906,
-0.019642276775473012,
-0.010893620860173042,
0.001230341899766145,
0.016221637398855598,
0.033304135659230648,
0.051486665261155681,
0.069636961761409016,
0.086570197432542767,
0.101144354207918147,
0.112353938422488253,
0.119413577288191297,
0.121823886314051028,
0.119413577288191297,
0.112353938422488253,
0.101144354207918147,
0.086570197432542767,
0.069636961761409016,
0.051486665261155681,
0.033304135659230648,
0.016221637398855598,
0.001230341899766145,
-0.010893620860173042,
-0.019642276775473012,
-0.024803890156806906,
-0.026464233332370746,
-0.024981800822463429,
-0.020940136918319988,
-0.015082497016061390,
-0.008235561806605458,
-0.001229734800309099,
]
)
filter_coeffs = np.array(h[::-1] * 32768, dtype=np.int16)
synth = synthio.Synthesizer(sample_rate=48000, filter=filter_coeffs)
def synthesize(synth):
n = synthio.Note(
frequency=120,
envelope=envelope,
filter=False,
)
print(synth, n)
synth.press((n,))
for _ in range(20):
n.frequency *= 1.0595
yield 36
synth.release_all()
yield 36
n.filter = True
n.frequency = 120
synth.press((n,))
for _ in range(20):
n.frequency *= 1.0595
yield 36
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("fir.wav", "w") as f:
f.setnchannels(1)
f.setsampwidth(2)
f.setframerate(48000)
for n in chain(synthesize(synth)):
for i in range(n):
result, data = audiocore.get_buffer(synth)
f.writeframes(data)