Audio is slow in Gradius III

```
The audio is very slow/laggy when trying to play Gradius III. No gameplay is 
affected. Haven't tried exporting to AVI yet.

Using v0.0.7 on Windows 7 x86.
```

Original issue reported on code.google.com by `thomasko...@gmail.com` on 17 Dec 2012 at 5:10
