I'm playing with japanese version of Castlevania Symphony of the Night (Akumajo Dracula X - Gekka no Yasoukyoku) with the italian patch (by same author of english patch), but I've some problems with the game. Sometimes (almost always) games freeze when entering a boss room or when I exit from it. But only when there is a boss in it and music change.
I play mounting the image on Daemon Tools with an IDE device and enabling Event reschedule with pSX emulator. The iso is the SLPM_86023. There are 2 bin files (Track 1 and Track 2) and a cue file.
One thing that helps is opening the menu right before entering a boss screen, and entering the boss screen AS YOU CLOSE the menu.
I was able to beat this game two times in pSX this way.
thanks, I already tried this trick and seems to work. But I don't know where are every boss chamber. Anyway, I have problems also with new areas loading and with musics. Sometimes, the music stop and don't loop. I've tried also burning the iso on a cd and play from it...but nothing change.