Glad that you like it! I enjoyed writing these emulators.
Yes, there's a next port coming up. I'm currently working on porting PicoDrive into this series of emulators. The implementation was pretty quick because it was already so optimized (as evident in the retroarch port), i didn't even have to write a hardware renderer. But the retroarch port still suffers from slowdowns regularly when things get busy. So on the old 3DS, I shifted the FM synthesizer emulation (arguably very heavy in terms of processing) to the 3DS's 2nd core.
On an old 3DS, it actually does runs full speed for MD games -- no slow downs, but we have to live with lower sound quality at 30khz on an old 3DS (despite offloading the FM synthesizer to the parallel 2nd core), which is really, really unfortunate.
But do look out for it in the next couple of weeks.
Picodrive is an awesome addition to the series! And thank you for looking after all of us O3ds and O2DS owners, sacrificing a bit of sound quality for full speed is a perfectly acceptable tradeoff.
I still have my original Megadrive somewhere in storage, it is something that reminds to always go with what the heart feels not what the head (or trend) says. Because way back then, you were either Nintendo or Sega, cutesy or gritty. I was in Japan and wanted to buy a Turbografx but all my friends laughed. The hype got to me and to my everlasting regret I bought a Megadrive instead.
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In Rondo of blood (eng) sound is cracking, noice. What am i doing wrong?
After noisy 1 cutscene music in game mutes, stays only sound of game.
Couple of things you can try. First, make sure you have the bios files, try changing them in settings and see if that solves the sound problem. If that doesn't work, try the original unpatched jp game with your current setup. If the original jp game works, then it's a problem with the English patched game. You can then try another copy, bin cue versions work for me.