code for soundboard scooter bike project

code for soundboard scooter bike project

Author: djecken

Soundboard_Scooter_Bike/code.py

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+# SPDX-FileCopyrightText: 2022 John Park for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+# put samples in "/wav" folder
+
+import time
+import board
+import keypad
+import audiocore
+import audiomixer
+import audiobusio
+from audiopwmio import PWMAudioOut as AudioOut
+
+# wait a little bit so USB can stabilize and not glitch audio
+time.sleep(3)
+
+# list of (samples to play, mixer gain level)
+wav_files = (
+    ('wav/airhorn.wav', 1.0),
+    ('wav/bike-horn.wav', 1.0),
+    ('wav/chime.wav', 1.0)
+)
+
+# pins used by keyboard
+KEY_PINS = (
+            board.D5, board.D6, board.D12
+)
+
+km = keypad.Keys( KEY_PINS, value_when_pressed=False, pull=True)
+
+audio = audiobusio.I2SOut(board.D1, board.D0, board.D9)
+
+mixer = audiomixer.Mixer(voice_count=len(wav_files), sample_rate=22050, channel_count=1,
+                         bits_per_sample=16, samples_signed=True)
+audio.play(mixer) # attach mixer to audio playback
+
+for i in range(len(wav_files)):  # start all samples at once for use w handle_mixer
+    wave = audiocore.WaveFile(open(wav_files[i][0],"rb"))
+    mixer.voice[i].play(wave, loop=True)
+    mixer.voice[i].level = 0
+
+def handle_mixer(num, pressed):
+    voice = mixer.voice[num]   # get mixer voice
+    if pressed:
+        voice.level = wav_files[num][1]  # play at level in wav_file list
+    else: # released
+        voice.level = 0  # mute it
+
+
+while True:
+    event = km.events.get()
+    if event:
+        if event.key_number < len(wav_files):
+            if event.pressed:
+                handle_mixer(event.key_number, True)
+
+            if event.released:
+                handle_mixer( event.key_number, False )