Are you still using Dolphin 3.0? Try something newer from the new AX HLE Branch, or alternatively, that branch was merged as of 3.5-78 into master. Note, with builds using the new AX ucode implementation, you'll need speeds to be close to 100%, else you'll get distorted audio like when using LLE audio. There's currently no time-stretching done.
Alternatively, you could use LLE audio for this game, but your computer's probably too weak to run it well (you haven't filled out your CPU specs, just the brand name for your computer). If you want to use LLE, you may need to use the VBeam Trick; the speed won't be 100%, but you may be able to get acceptable audio with LLE. If your CPU's too weak, however, it won't work miracles.
Alternatively, you could use LLE audio for this game, but your computer's probably too weak to run it well (you haven't filled out your CPU specs, just the brand name for your computer). If you want to use LLE, you may need to use the VBeam Trick; the speed won't be 100%, but you may be able to get acceptable audio with LLE. If your CPU's too weak, however, it won't work miracles.