The "flight" sound for your Arwing sounds kind of bad. As if it were clipping, or something (using 32KHz, stereo, gaussian interpolation). Was it like this on a real SNES? It's been eons since I played on the real system, so I can't really remember.
edit:
http://board.zsnes.com/phpBB2/viewtopic ... 822#112822
![Embarassed :oops:](./images/smilies/icon_redface.gif)