Magisk modules created to enable system-wide USB DAC support on MTK based Android head units.
MTK-based Android head units treat USB audio as a secondary, app-requested output. Even when a USB DAC (such as the Apple USB-C -> 3.5 mm adapter which is what I used for this project) is correctly detected, the system audio policy never promotes USB to the primary output, so navigation sounds, UI sounds, and other system audio continue playing through the speaker.
This module works around that design limitation by aliasing USB audio as a wired headphone device.
More info on the technical aspects can be found on the Wiki of this repo :)