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synthio: this modified biquad test lets me hear what I'm hunting

This commit is contained in:
Jeff Epler 2023-05-30 19:21:13 -05:00
parent 5f7998e6f2
commit 8a564602a1
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1 changed files with 17 additions and 34 deletions
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51
tests/circuitpython-manual/synthio/note/biquad.py
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@ -13,7 +13,7 @@ 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
attack_time=0.15, decay_time=0, release_time=0.08, attack_level=1.0, sustain_level=1.0
)
SAMPLE_SIZE = 1024
@ -30,41 +30,24 @@ 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),
synth.low_pass_filter(120),
):
n = synthio.Note(
frequency=80,
envelope=envelope,
filter=biquad,
waveform=waveform,
bend=synthio.LFO(bend_out, once=True, rate=1 / 2, scale=5),
)
for midi_note in range(24, 90, 3):
n = synthio.Note(
frequency=synthio.midi_to_hz(midi_note),
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
for waveform in (sine, None, noise):
n = synthio.Note(
frequency=555,
envelope=envelope,
waveform=waveform,
)
synth.press(n)
i = 220
while i < 1760:
n.filter = synth.band_pass_filter(i)
i *= 1.00579
yield 1
synth.release_all()
yield 6
synth.press(n)
print(n.frequency)
yield 24
synth.release_all()
yield 16
yield 24
yield 48
with wave.open("biquad.wav", "w") as f: