That would be a question for the author of all three apps: Marat Fayzullin http://maemo.org/profile/view/fms/

I'm glad that emulators exist and I like that the emulators work well enough that most games are playable, but I do agree that it is a little disappointing that the VGBA emulator still has sound issues which can make playing some games a less than ideal gaming experience.

An update to add a gui front end similar to picodrive and drnoksnes would make for a more uniform gaming experience on the n900