Showing content from https://todbot.github.io/CircuitPython_Synthio_Tutorial/2_modulation/code_tremolo.py below:
# 2_modulation/code_tremolo.py # part of todbot circuitpython synthio tutorial # 10 Feb 2025 - @todbot / Tod Kurt # import time, random import synthio from synth_setup import synth, knobA def lfo_set_min_max(lfo, lmin=0.0, lmax=1.0): lfo.scale = (lmax - lmin)/2 lfo.offset = lmax - lfo.scale while True: midi_note = random.randint(48,60) note = synthio.Note(synthio.midi_to_hz(midi_note)) note.amplitude = synthio.LFO(rate=5) knobA_val = 1 - (knobA.value / 65535) # convert 0-65535 to 1-0 lfo_set_min_max(note.amplitude, knobA_val, 1) print("tremolo:%.2f lfo scale:%.2f offset:%.2f" % (1-knobA_val, note.amplitude.scale, note.amplitude.offset)) synth.press(note) time.sleep(0.5) synth.release(note) time.sleep(0.2)
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