Rhea is an SD card based replacement for the optical drive in Saturn console. heres the latest news concerning it:

Consider it a late Xmas present: There is a new FW for Rhea/Phobe that should fix those few games that use CDDA for voiceovers. Itís probably not a complete list but the affected titles are:

  • Taito Chase HQ
  • Side Pocket 2
  • Space Jam
  • Nobunaga no Yabou Shouseiroku
  • Monster Slider

I did test it but not very extensively and the code change is significant so new bugs might manifest too
Speaking of bugs, keep in mind that Bug! works but only when booted cleanly without RMENU. And obviously the fixed games I mentioned do require the images to contain all the subchannel data to work Ė so make sure your dump is correct. I will ignore any problem/bug reports from people who canít tell, but I realize not everyone knows (or wantís to know) such technical details. So as a rule of thumb a CUE/BIN format doesnít have subs (yet another reason why itís $#@!) but CCD does. If it was properly dumped from original disc anyway. Same for CDI but this format defaults to no subs so again you need to know how to rip the CD properly or you will end up with an image that doesnít quite work. MDS/MDF is like CDI, it can carry subs but itís not the default setting.
This whole format issue comes back every now and then, and each time I hear the argument that CUE is not so bad Ė 90% of games work without issues. Well, I donít aim for 90%, I aim for 100%.

more details here --> https://gdemu.wordpress.com/2017/12/...e-of-midnight/