0aa3d94100
Update parser API so that a MIDI file is passed to parse() rather than during the init. This way you can dynamically pass a midi file to the parser in user code
76 lines
2 KiB
Python
76 lines
2 KiB
Python
# SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
"""
|
|
Simple example showing how to use the adafruit_midi_parser library
|
|
to play a MIDI file with the built-in LED blinking on notes.
|
|
"""
|
|
|
|
import os
|
|
import time
|
|
|
|
import board
|
|
import digitalio
|
|
|
|
import adafruit_midi_parser
|
|
|
|
# Setup the built-in LED
|
|
led = digitalio.DigitalInOut(board.LED)
|
|
led.direction = digitalio.Direction.OUTPUT
|
|
|
|
# Path to your MIDI file
|
|
midi_file = "/song.mid"
|
|
|
|
|
|
# Create a custom player class
|
|
class Custom_Player(adafruit_midi_parser.MIDIPlayer):
|
|
def on_note_on(self, note, velocity, channel): # noqa: PLR6301
|
|
print(f"Note On: {note}, velocity: {velocity}")
|
|
led.value = True
|
|
|
|
def on_note_off(self, note, velocity, channel): # noqa: PLR6301
|
|
print(f"Note Off: {note}")
|
|
led.value = False
|
|
|
|
def on_end_of_track(self, track): # noqa: PLR6301
|
|
print(f"End of track {track}")
|
|
time.sleep(5)
|
|
|
|
def on_playback_complete(self): # noqa: PLR6301
|
|
print("Playback complete, restarting...")
|
|
# Flash LED to indicate end of sequence
|
|
for _ in range(3):
|
|
led.value = True
|
|
time.sleep(0.05)
|
|
led.value = False
|
|
time.sleep(0.05)
|
|
|
|
|
|
print("MIDI File Player")
|
|
print("===============")
|
|
|
|
# Check if the file exists
|
|
if midi_file[1:] in os.listdir("/"):
|
|
print(f"Found MIDI file {midi_file}")
|
|
|
|
# Create a MIDIParser instance
|
|
parser = adafruit_midi_parser.MIDIParser()
|
|
|
|
# Parse the file
|
|
parser.parse(midi_file)
|
|
print(f"Successfully parsed! Found {len(parser.events)} events.")
|
|
print(f"BPM: {parser.bpm:.1f}")
|
|
print(f"Note Count: {parser.note_count}")
|
|
|
|
# Create our player and enable looping
|
|
player = Custom_Player(parser)
|
|
|
|
# Start playback
|
|
print("Starting playback...")
|
|
|
|
# Main loop
|
|
while True:
|
|
# Update the player (process events)
|
|
player.play(loop=True)
|
|
else:
|
|
print(f"MIDI file {midi_file} not found")
|