Drums for Circuitpython synthio

import ulab.numpy as np import random import synthio

SAMPLE_SIZE = 200 sinwave1 = np.array(np.sin(np.linspace(0, 2np.pi, SAMPLE_SIZE, endpoint=False)) * 32767, dtype=np.int16) sinwave2 = np.array(np.sin(np.linspace(np.pi/2, 2.5np.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))