so in the mame 244 some games like konami game vendetta , the music play a bit fast ? the core 235 run the sound “normal” in this game 
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I believe this is just a MAME accuracy whack-a-mole situation, where they’ve made something more accurate and it’s revealed/created problems elsewhere. Have you verified whether it happens with standalone/upstream MAME (i.e., whether it’s a libretro-specific issue, though I doubt it).
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