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GameBoy HiFi Audio
A Bluetooth audio upgrade for the Game Boy Advance. It removes the console's stock audio amp and replaces the whole audio back end with an ESP32 and an ES8388 codec. The mod streams game audio to Bluetooth headphones and speakers, and it also drives the GBA's built-in speaker and wired headphone jack itself, with onboard EQ, volume, and sound effects.
What the mod does, start to finish
AGB main board (left) and flex (right)
What you get:
- Bluetooth (A2DP) output to any standard headphones or speaker.
- Wired headphones and the internal speaker, driven by the onboard codec.
- EQ, volume, and sound-effect cues, tunable from a phone or laptop over Bluetooth (no app install, it runs in the browser).
- A battery-saver mode that puts the radio and CPU to sleep and passes audio through the codec in analog, for long unplugged sessions.
- Firmware updates over Bluetooth.
The browser config page: a live spectrum and per-output EQ, tuned over Bluetooth with no app to install
Prebuilt, pre-assembled kits are coming soon at cajunpanda.com, for anyone who would rather not source the parts and solder it themselves. Kits ship pre-flashed and update over Bluetooth, so they need no programming cable. The listing also has an A/B recording of the mod with its filters off and on, and an optional speaker.
Questions, build photos, and troubleshooting happen on the Discord.
This repository currently holds the board for the original Game Boy Advance (AGB). The firmware is shared across models. Boards for other Game Boy models will be added under as they are designed.
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