60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
|
import audiocore
|
||
|
|
import synthio
|
||
|
|
from ulab import numpy as np
|
||
|
|
import wave
|
||
|
|
|
||
|
|
SAMPLE_SIZE = 1024
|
||
|
|
VOLUME = 32700
|
||
|
|
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
|
||
|
|
)
|
||
|
|
melody = synthio.MidiTrack(
|
||
|
|
b"\0\x90H\0*\x80H\0\6\x90J\0*\x80J\0\6\x90L\0*\x80L\0\6\x90J\0"
|
||
|
|
+ b"*\x80J\0\6\x90H\0*\x80H\0\6\x90J\0*\x80J\0\6\x90L\0T\x80L\0"
|
||
|
|
+ b"\x0c\x90H\0T\x80H\0\x0c\x90H\0T\x80H\0",
|
||
|
|
tempo=240,
|
||
|
|
sample_rate=48000,
|
||
|
|
waveform=sine,
|
||
|
|
envelope=envelope,
|
||
|
|
)
|
||
|
|
|
||
|
|
# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
|
||
|
|
with wave.open("tune.wav", "w") as f:
|
||
|
|
f.setnchannels(1)
|
||
|
|
f.setsampwidth(2)
|
||
|
|
f.setframerate(48000)
|
||
|
|
while True:
|
||
|
|
result, data = audiocore.get_buffer(melody)
|
||
|
|
if data is None:
|
||
|
|
break
|
||
|
|
f.writeframes(data)
|
||
|
|
if result != 1:
|
||
|
|
break
|
||
|
|
|
||
|
|
melody = synthio.MidiTrack(
|
||
|
|
b"\0\x90H\0*\x80H\0\6\x90J\0*\x80J\0\6\x90L\0*\x80L\0\6\x90J\0"
|
||
|
|
+ b"*\x80J\0\6\x90H\0*\x80H\0\6\x90J\0*\x80J\0\6\x90L\0T\x80L\0"
|
||
|
|
+ b"\x0c\x90H\0T\x80H\0\x0c\x90H\0T\x80H\0",
|
||
|
|
tempo=240,
|
||
|
|
sample_rate=48000,
|
||
|
|
waveform=sine,
|
||
|
|
)
|
||
|
|
|
||
|
|
# 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)
|
||
|
|
while True:
|
||
|
|
result, data = audiocore.get_buffer(melody)
|
||
|
|
if data is None:
|
||
|
|
break
|
||
|
|
f.writeframes(data)
|
||
|
|
if result != 1:
|
||
|
|
break
|