Previous versions suffered from crackling audio or timing disconnects in games like Metal Slug 2 (notorious for slowdown, though that’s a ROM issue). MVSPSP 2.3.5 introduced better Z80 synchronization, resulting in cleaner music and sound effects at 44.1 kHz.
Ensure your neogeo.zip is placed inside the roms folder. Verify that your BIOS zip contains vital system files like usa_2slt.bin , sp-s2.sp1 , and sm1.sm1 . Conclusion mvspsp 2.3.5
Copy neogeo.zip directly into the PSP/GAME/mvspsp/roms/ folder. Step 3: Adding Games (ROMs) Previous versions suffered from crackling audio or timing