65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
import numpy as np
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import soundbox
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import sys
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if len(sys.argv) != 2:
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print(f"""Utilisation: {sys.argv[0]} [output]
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Génère un morceau au synthétiseur dans le fichier [output].""")
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sys.exit(1)
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output_file = sys.argv[1]
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def sharp_sine(dur, freq, value=1):
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return soundbox.envelope(
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attack=.005, decay=.1, release=.1,
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signal=soundbox.sine(dur + .2, freq, value))
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def smooth_sine(dur, freq, value=1):
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return soundbox.envelope(
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attack=.1, decay=.2, release=.1,
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signal=soundbox.sine(dur + .2, freq, value))
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length = 9
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signal = soundbox.silence(length)
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chords_l = (
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(('do', 2),),
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(('sol', 2),),
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(('la', 2),),
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(('sol', 2),),
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(('do', 2),),
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(('sol', 2),),
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(('la', 2),),
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(('sol', 2),),
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)
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chords_r = (
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(('do', 3), ('mi', 3), ('sol', 3)),
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(('sol', 3), ('si', 3), ('re', 4)),
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(('la', 3), ('do', 4), ('mi', 4)),
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(('fa', 3), ('la', 3), ('do', 4)),
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)
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for shift in np.arange(.5, length - 4, 4):
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for i in range(len(chords_l)):
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soundbox.add_signal(signal, start=i / 2 + shift,
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source=soundbox.chord(
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instr=smooth_sine, dur=.6 if shift == 4.5 and i == 7 else .4,
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freqs=soundbox.note_freqs(chords_l[i]),
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value=.4
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))
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for i in range(len(chords_r)):
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soundbox.add_signal(signal, start=i + shift,
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source=soundbox.chord(
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instr=sharp_sine, dur=0.9,
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freqs=soundbox.note_freqs(chords_r[i]),
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value=.4
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))
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soundbox.save_signal(output_file, signal)
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