ESP32 Bluetooth A2DP SRC

Using ESP-IDF to send raw PCM data to a fidget spinner

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This initially started as an attempt to get 4-bit SDIO working on an ESP32. I noticed an A2DP-SRC example that sent random data to a sink in the IDF and decided it could be a bit better.

Linked below is my hack to the example A2DP-SRC code so that it streams raw PCM data from a SD card. Also linked below is a video on YouTube of it playing the Super Mario Bros. theme song.

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