WaveFile – Load a wave file for audio playback

A .wav file prepped for audio playback. Only mono and stereo files are supported. Samples must be 8 bit unsigned or 16 bit signed.

class audioio.WaveFile(file)

Load a .wav file for playback with audioio.AudioOut or audiobusio.I2SOut.

Parameters:file (typing.BinaryIO) – Already opened wave file

Playing a wave file from flash:

import board
import audioio
import digitalio

# Required for CircuitPlayground Express
speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
speaker_enable.switch_to_output(value=True)

data = open("cplay-5.1-16bit-16khz.wav", "rb")
wav = audioio.WaveFile(data)
a = audioio.AudioOut(board.A0)

print("playing")
a.play(wav)
while a.playing:
  pass
print("stopped")
deinit()

Deinitialises the WaveFile and releases all memory resources for reuse.

__enter__()

No-op used by Context Managers.

__exit__()

Automatically deinitializes the hardware when exiting a context. See Lifetime and ContextManagers for more info.

sample_rate

32 bit value that dictates how quickly samples are loaded into the DAC in Hertz (cycles per second). When the sample is looped, this can change the pitch output without changing the underlying sample.

bits_per_sample

Bits per sample. (read only)

channel_count

Number of audio channels. (read only)