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jeplerjepler
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synthio: add some new manual tests
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‎tests/circuitpython-manual/synthio/note/envelope.py

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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import random
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import audiocore
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import synthio
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from ulab import numpy as np
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import adafruit_wave as wave
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SAMPLE_SIZE = 1024
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VOLUME = 32767
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sine = np.array(
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np.sin(np.linspace(0, 2 * np.pi, SAMPLE_SIZE, endpoint=False)) * VOLUME,
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dtype=np.int16,
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)
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envelope = synthio.Envelope(attack_time=0.05, decay_time=8, release_time=0.25, sustain_level=0)
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fast_decay_envelope = synthio.Envelope(
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attack_time=0.05, decay_time=0.25, release_time=0.25, sustain_level=0
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)
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synth = synthio.Synthesizer(sample_rate=48000)
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def synthesize(synth):
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notes = (synthio.Note(frequency=440, waveform=sine, envelope=envelope),)
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synth.press(notes)
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yield 360
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notes[0].envelope = fast_decay_envelope
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yield 180
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synth.release_all()
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def synthesize2(synth):
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notes = (synthio.Note(frequency=440, waveform=sine, envelope=envelope),)
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synth.press(notes)
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yield 360
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synth.release_all()
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yield 180
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def chain(*args):
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for a in args:
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yield from a
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# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
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with wave.open("envelope.wav", "w") as f:
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f.setnchannels(1)
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f.setsampwidth(2)
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f.setframerate(48000)
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for n in chain(synthesize(synth), synthesize2(synth)):
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for i in range(n):
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result, data = audiocore.get_buffer(synth)
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f.writeframes(data)

‎tests/circuitpython-manual/synthio/note/fir.py

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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import random
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import audiocore
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import synthio
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from ulab import numpy as np
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import adafruit_wave as wave
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random.seed(9)
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envelope = synthio.Envelope(
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attack_time=0.1, decay_time=0.05, release_time=0.2, attack_level=0.8, sustain_level=0.8
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)
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h = np.array(
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[
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-0.001229734800309099,
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-0.008235561806605458,
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-0.015082497016061390,
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-0.020940136918319988,
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-0.024981800822463429,
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-0.026464233332370746,
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-0.024803890156806906,
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-0.019642276775473012,
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-0.010893620860173042,
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0.001230341899766145,
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0.016221637398855598,
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0.033304135659230648,
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0.051486665261155681,
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0.069636961761409016,
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0.086570197432542767,
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0.101144354207918147,
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0.112353938422488253,
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0.119413577288191297,
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0.121823886314051028,
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0.119413577288191297,
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0.112353938422488253,
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0.101144354207918147,
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0.086570197432542767,
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0.069636961761409016,
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0.051486665261155681,
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0.033304135659230648,
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0.016221637398855598,
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0.001230341899766145,
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-0.010893620860173042,
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-0.019642276775473012,
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-0.024803890156806906,
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-0.026464233332370746,
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-0.024981800822463429,
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-0.020940136918319988,
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-0.015082497016061390,
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-0.008235561806605458,
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-0.001229734800309099,
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]
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)
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filter_coeffs = np.array(h[::-1] * 32768, dtype=np.int16)
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synth = synthio.Synthesizer(sample_rate=48000, filter=filter_coeffs)
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def synthesize(synth):
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n = synthio.Note(
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frequency=120,
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envelope=envelope,
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filter=False,
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)
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print(synth, n)
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synth.press((n,))
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for _ in range(20):
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n.frequency *= 1.0595
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yield 36
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synth.release_all()
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yield 36
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n.filter = True
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n.frequency = 120
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synth.press((n,))
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for _ in range(20):
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n.frequency *= 1.0595
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yield 36
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synth.release_all()
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yield 36
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def chain(*args):
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for a in args:
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yield from a
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# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
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with wave.open("fir.wav", "w") as f:
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f.setnchannels(1)
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f.setsampwidth(2)
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f.setframerate(48000)
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for n in chain(synthesize(synth)):
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for i in range(n):
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result, data = audiocore.get_buffer(synth)
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f.writeframes(data)

‎tests/circuitpython-manual/synthio/note/panning.py

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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import random
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import audiocore
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import synthio
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from ulab import numpy as np
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import adafruit_wave as wave
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random.seed(9)
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SAMPLE_SIZE = 1024
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VOLUME = 14700
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sine = np.array(
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np.sin(np.linspace(0, 2 * np.pi, SAMPLE_SIZE, endpoint=False)) * VOLUME,
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dtype=np.int16,
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)
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envelope = synthio.Envelope(
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attack_time=0.1, decay_time=0.05, release_time=0.2, attack_level=0.8, sustain_level=0.8
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)
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synth = synthio.Synthesizer(sample_rate=48000, channel_count=2)
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def synthesize(synth):
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n = synthio.Note(
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frequency=440,
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waveform=sine,
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envelope=envelope,
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)
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print(synth, n)
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synth.press((n,))
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for p in range(-10, 11, 1):
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n.panning = p / 10
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yield 36
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synth.release_all()
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yield 36
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def chain(*args):
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for a in args:
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yield from a
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# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
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with wave.open("panning.wav", "w") as f:
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f.setnchannels(2)
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f.setsampwidth(2)
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f.setframerate(48000)
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for n in chain(synthesize(synth)):
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for i in range(n):
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result, data = audiocore.get_buffer(synth)
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f.writeframes(data)

‎tests/circuitpython-manual/synthio/note/ring.py

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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import random
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import audiocore
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import synthio
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from ulab import numpy as np
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import adafruit_wave as wave
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random.seed(9)
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SAMPLE_SIZE = 1024
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VOLUME = 32767
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sine = np.array(
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np.sin(np.linspace(0, 2 * np.pi, SAMPLE_SIZE, endpoint=False)) * VOLUME,
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dtype=np.int16,
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)
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envelope = synthio.Envelope(
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attack_time=0.1, decay_time=0.05, release_time=0.2, attack_level=0.8, sustain_level=0.8
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)
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synth = synthio.Synthesizer(sample_rate=48000)
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def synthesize(synth):
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n = synthio.Note(
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frequency=120,
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waveform=sine,
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ring_waveform=sine,
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ring_frequency=769,
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envelope=envelope,
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bend_mode=synthio.BendType.VIBRATO,
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bend_depth=50 / 1200,
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bend_rate=7,
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)
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print(synth, n)
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synth.press((n,))
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yield 720
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synth.release_all()
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yield 36
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def chain(*args):
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for a in args:
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yield from a
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# sox -r 48000 -e signed -b 16 -c 1 tune.raw tune.wav
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with wave.open("ring.wav", "w") as f:
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f.setnchannels(1)
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f.setsampwidth(2)
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f.setframerate(48000)
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for n in chain(synthesize(synth)):
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for i in range(n):
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result, data = audiocore.get_buffer(synth)
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f.writeframes(data)

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