Hello, i downloaded Recalbox a few days ago, and i'm enjoying alot, but i'm having some problems with arcade games. I downloaded the Mortal Kombat series on 0.78 Fullset, and i'm having some problems. MK1 runs a little slow with a sound issue (is like "blastered" sound) Mk2 runs perfect but with a very low sound (is a known issue on that ROM in any mame version) MK3 runs a little slow with very low sound too   Running on MAME2003. Anyway to fix it? I don't know how to change to imame4all.   Also, i tried to run KOF 2002 on FBA, the emulator load the rom but after that comes a black screen and the game doesnt start, any fix?

<p style="text-align: left;">I downloaded my Doom 2 of steam and paste the wad on pr doom folder but both Doom Shareware and Doom 2 doesnt play music, is running perfect, but without music.</p>