BLUETOOTH HEADPHONE DAC
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https://etservice.us/work/bluetooth-dac

Status: Prototype
Year:   In review
Role:   Audio-board experiment

An ESP32 and ES8388 audio-board experiment for using wired headphones
wirelessly.

01. THE PROBLEM
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Many devices no longer have a headphone jack, while good wired
headphones still work.

02. WHAT I BUILT
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I explored a compact wireless audio board around an ESP32 and ES8388
codec.

03. WHAT I LEARNED
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Audio hardware needs measured performance, not just a signal at the
output.

04. WHAT'S NEXT
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Verify the final board revision and publish measurements before calling
it complete.

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