audiomixer-drum-macahine.py

audiomixer-drum-macahine.py

# audiomixer-drum-machine.py
import board, time, digitalio, touchio
import audiomixer, audiocore
try:
    from audioio import AudioOut
except ImportError: 
    try:
        from audiopwmio import PWMAudioOut as AudioOut
    except ImportError:
        print("This board does not support audio")
from adafruit_led_animation.color import RED, YELLOW, ORANGE, GREEN, TEAL, CYAN, \
    BLUE, PURPLE, MAGENTA, GOLD, PINK, AQUA, JADE, AMBER, OLD_LACE, WHITE, BLACK

# Speaker setup for the CircuitPlayground boards (not for Pico)
speaker = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
speaker.direction = digitalio.Direction.OUTPUT
speaker.value = True

# use speaker location to create an AudioOut object named audio
audio = AudioOut(board.SPEAKER) # use board.GP# for pin number for audio out on a Pico
# set path where audio files can be found on device
path = "drumSounds/"

drumsamples = ["bass_hit_c.wav", "bd_tek.wav", "bd_zome.wav", "drum_cowbell.wav", \
               "elec_cymbal.wav", "elec_hi_snare.wav", "scratch.wav", "splat.wav"]

# create Mixer and attach to audio playback
mixer = audiomixer.Mixer(voice_count=1, sample_rate=22050, channel_count=1, bits_per_sample=16, samples_signed=True)
audio.play(mixer)

# setup touchpads
pads = [board.A1, board.A2, board.A3, board.A4, board.A5, board.A6, board.TX]
# create an empty list of touchpads
touchpads = []
# loop through all pads
for pad in pads:
    touchpads.append(touchio.TouchIn(pad))

def play_voice(filename):
    wave = audiocore.WaveFile(open(path+filename,"rb"))
    mixer.voice[0].play(wave)
    # mixer.voice[0].level = 1.0
    while mixer.voice[0].playing:
        pass

while True:
    while True:
        for i in range(len(touchpads)):
            if touchpads[i].value:  # if this pad was touched
                play_voice(drumsamples[i])