Trying to get decent speeds with Wind Waker

[ishinjik]

I've spent the whole day now trying to set up Dolphin to play LoZ : Wind Waker. I've searched up quite a number of threads and guides concerning running this game. I understand that I need to run DSP LLE to avoid desyncing audio which leads to crashing. I know about the glitches as well.

Anyway my specs are as follows:
CPU - Intel Pentium Dual Core E5200 2.50GHz OC'd to 3.50GHz
GPU - MSI ATI Radeo HD4670 GDDR3 512MB
RAM - DDR2 4GB

Now, I don't expect to run the game at full speed as my machine has quite a bit of age on it. But I want to be able to at least stay above 20FPS and not drop to like 12FPS.

Earlier on I've just been trying to run the game in 3.0-578 and that runs the game slightly faster but does not play audio. I tried the 3.0 release and audio is there, but it's slower now.

My question is, can my machine actually play this game at the speeds I desire or is it just impossible? If it is possible, maybe someone can guide me to getting there.

Thanks in advance.

Settings on 3.0-578