logging when API call not implemented?

[[Unknown]]

Well, if an HLE syscall is not implemented, it will log this in the console. Go to Debug -> Show Console to find out.

There can be many other reasons. If you continue to hear sounds, it could either be a scheduling issue, or simply a graphics issue. Try pressing buttons or pressing fast forward (tab by default.) The game may just be loading slowly.

You can also use the disassembly to see what it's doing, by pausing the game.

-[Unknown]