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May 31, 2023 23:53
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Drums for Circuitpython synthio
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| import ulab.numpy as np | |
| import random | |
| import synthio | |
| SAMPLE_SIZE = 200 | |
| sinwave1 = np.array(np.sin(np.linspace(0, 2*np.pi, SAMPLE_SIZE, endpoint=False)) * 32767, dtype=np.int16) | |
| sinwave2 = np.array(np.sin(np.linspace(np.pi/2, 2.5*np.pi, SAMPLE_SIZE, endpoint=False)) * 32767, dtype=np.int16) | |
| downwave = np.linspace(32767, -32767, num=3, dtype=np.int16) | |
| noisewave = np.array([random.randint(-32767, 32767) for i in range(SAMPLE_SIZE)], dtype=np.int16) | |
| w1 = np.array( [int(max(min(sinwave1[i] + (noisewave[i]/2.0), 32767), -32767)) for i in range(SAMPLE_SIZE)], dtype=np.int16) | |
| w2 = np.array( [int(max(min(sinwave2[i] + (noisewave[i]/2.0), 32767), -32767)) for i in range(SAMPLE_SIZE)], dtype=np.int16) | |
| class KickDrum: | |
| def __init__(self, synth): | |
| self.synth = synth | |
| self.lfo = synthio.LFO(waveform=downwave) | |
| self.lfo.once = True | |
| self.lfo.offset=0.33 | |
| self.lfo.scale = 0.3 | |
| self.lfo.rate=20 | |
| self.filter_fr = 2000 | |
| self.lpf = self.synth.low_pass_filter(frequency=self.filter_fr) | |
| self.amp_env1 = synthio.Envelope(attack_time=0.0, decay_time=0.075, release_time=0, attack_level=1, sustain_level=0) | |
| self.note1 = synthio.Note(frequency=53, envelope=self.amp_env1, waveform=sinwave2, filter=self.lpf, bend=self.lfo) | |
| self.amp_env2 = synthio.Envelope(attack_time=0.0, decay_time=0.055, release_time=0, attack_level=1, sustain_level=0) | |
| self.note2 = synthio.Note(frequency=72, envelope=self.amp_env2, waveform=sinwave1, filter=self.lpf, bend=self.lfo) | |
| self.amp_env3 = synthio.Envelope(attack_time=0.0, decay_time=0.095, release_time=0, attack_level=1, sustain_level=0) | |
| self.note3 = synthio.Note(frequency=41, envelope=self.amp_env3, waveform=sinwave2, filter=self.lpf, bend=self.lfo) | |
| def setLPF(self, fr): | |
| self.filter_fr = fr | |
| self.lpf = self.synth.low_pass_filter(frequency=self.filter_fr) | |
| self.note1.filter = self.lpf | |
| self.note2.filter = self.lpf | |
| self.note3.filter = self.lpf | |
| def play(self, synth=None): | |
| if synth is None: | |
| synth = self.synth | |
| self.lfo.retrigger() | |
| synth.press((self.note1, self.note2, self.note3)) | |
| class Snare: | |
| def __init__(self, synth): | |
| self.synth = synth | |
| self.lfo = synthio.LFO(waveform=downwave) | |
| self.lfo.once = True | |
| self.lfo.offset=0.33 | |
| self.lfo.scale = 0.3 | |
| self.lfo.rate=20 | |
| self.filter_fr = 9500 | |
| self.lpf = self.synth.low_pass_filter(self.filter_fr) | |
| self.amp_env1 = synthio.Envelope(attack_time=0.0, decay_time=0.115, release_time=0, attack_level=1, sustain_level=0) | |
| self.note1 = synthio.Note(frequency=90, envelope=self.amp_env1, waveform=w1, filter=self.lpf, bend=self.lfo) | |
| self.amp_env2 = synthio.Envelope(attack_time=0.0, decay_time=0.095, release_time=0, attack_level=1, sustain_level=0) | |
| self.note2 = synthio.Note(frequency=135, envelope=self.amp_env2, waveform=w2, filter=self.lpf, bend=self.lfo) | |
| self.amp_env3 = synthio.Envelope(attack_time=0.0, decay_time=0.115, release_time=0, attack_level=1, sustain_level=0) | |
| self.note3 = synthio.Note(frequency=165, envelope=self.amp_env3, waveform=w2, filter=self.lpf, bend=self.lfo) | |
| def setLPF(self, fr): | |
| self.filter_fr = fr | |
| self.lpf = self.synth.low_pass_filter(frequency=self.filter_fr) | |
| self.note1.filter = self.lpf | |
| self.note2.filter = self.lpf | |
| self.note3.filter = self.lpf | |
| def play(self, synth=None): | |
| if synth is None: | |
| synth = self.synth | |
| self.lfo.retrigger() | |
| synth.press((self.note1, self.note2, self.note3)) | |
| class HighHat: | |
| def __init__(self, synth, t=0.115): | |
| self.lfo = synthio.LFO(waveform=downwave) | |
| self.lfo.once = True | |
| self.lfo.offset=0.33 | |
| self.lfo.scale = 0.3 | |
| self.lfo.rate=20 | |
| self.synth = synth | |
| self.t = t | |
| self.filter_fr = 9500 | |
| self.hpf = self.synth.high_pass_filter(self.filter_fr) | |
| self.amp_env1 = synthio.Envelope(attack_time=0.0, decay_time=t, release_time=0, attack_level=1, sustain_level=0) | |
| self.note1 = synthio.Note(frequency=90, envelope=self.amp_env1, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| self.amp_env2 = synthio.Envelope(attack_time=0.0, decay_time=t-0.02, release_time=0, attack_level=1, sustain_level=0) | |
| self.note2 = synthio.Note(frequency=135, envelope=self.amp_env2, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| self.amp_env3 = synthio.Envelope(attack_time=0.0, decay_time=t, release_time=0, attack_level=1, sustain_level=0) | |
| self.note3 = synthio.Note(frequency=165, envelope=self.amp_env3, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| def setHPF(self, fr): | |
| self.filter_fr = fr | |
| self.hpf = self.synth.high_pass_filter(frequency=self.filter_fr) | |
| self.note1.filter = self.hpf | |
| self.note2.filter = self.hpf | |
| self.note3.filter = self.hpf | |
| def setTime(self, t): | |
| self.t = t | |
| self.amp_env1 = synthio.Envelope(attack_time=0.0, decay_time=t, release_time=0, attack_level=1, sustain_level=0) | |
| self.note1 = synthio.Note(frequency=90, envelope=self.amp_env1, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| self.amp_env2 = synthio.Envelope(attack_time=0.0, decay_time=t-0.02, release_time=0, attack_level=1, sustain_level=0) | |
| self.note2 = synthio.Note(frequency=135, envelope=self.amp_env2, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| self.amp_env3 = synthio.Envelope(attack_time=0.0, decay_time=t, release_time=0, attack_level=1, sustain_level=0) | |
| self.note3 = synthio.Note(frequency=165, envelope=self.amp_env3, waveform=noisewave, filter=self.hpf, bend=self.lfo) | |
| def play(self, synth=None): | |
| if synth is None: | |
| synth = self.synth | |
| self.lfo.retrigger() | |
| synth.press((self.note1, self.note2, self.note3)) | |
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