When playing Yoshi Topsy-Turvy patched to work with the L-R buttons instead of a gyro sensor, all audio suddenly dissapears the moment the main menu is reached (However, it works just fine before reaching the main menu). I have tried the same patched ROM on VBA, mGBA and GBARunner2-3 and they all run the game with no issues, so this leads me to believe this might be OAF-specific.
The patch in question may be found here: https://gbatemp.net/threads/gba-no-tilt-patches-for-ds-users.584128/