The audio lagging is due to the emulator it self not the audio buffer on the pi. What I believe is happening is to get the games playable at a decent speed, the emulator is throwing the audio out of sync with the game. I am assuming it’s easier on the hardware if it’s not trying to keep the audio in-sync with the video. I noticed this with SanFrancisco rush, where there is about a 1 to 2 second delay on the audio. Other than that the game plays at full speed and works great. It’s a bit of a hack but it gets many games fully playable at great speed. Might can ask Gizmo, as he would probably better be able to explain what’s going on, but I don’t belive adjusting anything outside of the emulator would improve this. I got around 60 games that work great, either perfectly or close to it for N64. This is just how it is with N64 emulation on the PI, you really need more power to emulate N64 properly, but even on PC there are many games that don’t work or have issues still.