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3 Commits

Author SHA1 Message Date
Jeff Epler 6b44e40ee8 audiocore: Factor from audioio 
When nrf pwm audio is introduced, it will be called `audiopwmio`.  To
enable code sharing with the existing (dac-based) `audioio`, factor
the sample and mixer types to `audiocore`.

INCOMPATIBLE CHANGE: Now, `Mixer`, `RawSample` and `WaveFile` must
be imported from `audiocore`, not `audioio`.
 2019-07-25 06:44:26 -05:00
Scott Shawcroft 76008ce304
Introduce audioio.Mixer which can mix multiple audio samples 
to produce a single sample.

Only works with 16 bit samples on the M4.

Fixes #987
 2018-10-05 15:12:23 -07:00
Dan Halbert e724bc1c4e Fix playing audio from SD card 2018-06-14 18:47:40 -04:00