I'm having a small issue with Swiss v0.5r963 on my PAL DOL-101 Cube.
It is equipped with a GC Loader and I'm booting Swiss using that. I've got Boot Through IPL enabled because I absolutely need to see and hear the sweet boot animation at the start of all my games

On that particular GameCube, when I try to boot Metroid Prime 2 (it's the only game I currently have on that SD Card) the audio is completely out of sync in the IPL. The sound is about a second or maybe 1.5 seconds behind what's happening on the screen.
This doesn't happen on my NTSC DOL-001 GameCube.
I don't know how relevant this is, but I'm running the NTSC-U version of Prime 2 and I am not forcing a resolution since I'm using an RGB SCART cable. Thus far, I haven't witnessed any sort of audio delay during gameplay but I also haven't got much playtime in on this Cube. Will report later today

I can try a PAL game if that's relevant.
Can anyone help me out here? Thanks!
EDIT: Also, I'm using an SD2SP2 as the config device.