metal_slugger
regarding the reicast issue (runs too fast without audio):
if anything goes wrong with the audio drivers, reicast go wrong while it is sync with audio
you could alternatively use libretro/flycast instead of reicast for dreamcast emulation (flycast runs better than reicast in general)
regarding your controller issue, try this:
https://forum.batocera.org/d/3897-batoceralinux-526-rc2/39
