audiomp3 – Support for MP3-compressed audio files¶
Available on these boards
- class audiomp3.MP3Decoder(file: BinaryIO, buffer: _typing.WriteableBuffer)¶
Load a mp3 file for audio playback
Load a .mp3 file for playback with
audioio.AudioOutoraudiobusio.I2SOut.- Paramètres:
file (BinaryIO) – Already opened mp3 file
buffer (WriteableBuffer) – Optional pre-allocated buffer, that will be split in half and used for double-buffering of the data. If not provided, two buffers are allocated internally. The specific buffer size required depends on the mp3 file.
Playing a mp3 file from flash:
import board import audiomp3 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-16bit-16khz-64kbps.mp3", "rb") mp3 = audiomp3.MP3Decoder(data) a = audioio.AudioOut(board.A0) print("playing") a.play(mp3) while a.playing: pass print("stopped")
- file :BinaryIO¶
File to play back.
- sample_rate :int¶
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 :int¶
Bits per sample. (read only)
- channel_count :int¶
Number of audio channels. (read only)
- rms_level :float¶
The RMS audio level of a recently played moment of audio. (read only)
- __enter__() MP3Decoder¶
No-op used by Context Managers.
- __exit__() None¶
Automatically deinitializes the hardware when exiting a context. See Lifetime and ContextManagers for more info.