SEGA Saturn help

I’m having trouble playing certain Saturn ROMs on Yabasanshiro. Most of the ones I download work just fine but certain titles either just don’t want to work, or suffer from severe slowdown and/or audio issues.

The ones I’ve found to have these problems are:

Burning Rangers and Die Hard Arcade - slowdown, audio glitches.

Last Bronx - slowdown.

Astal, Bug!, Bug Too!, Clockwork Knight, Fighters Megamix - refuse to start up.

It doesn’t matter what website I get them from, these happen every time I try to start them. Are those games just incompatible with the program or do I just need to adjust something?