Hi. Sorry to revive this topic, but I came across it during a search. I had been trying to find a good way to convert YM2151 voice data to VOPM format so naturally I was thrilled when I found the Mame build in this topic. However, I can't seem to get it to work.
I downloaded the binary linked to earlier in this thread, and opened up Gradius III (the game I'd like to extract data from) with it. The first thing I noticed was that for some reason, the PCM sounds were scrambled. The FM sounds seemed to be playing properly, but I couldn't toggle them with the number keys as per the instructions. Upon pressing 9, an OPM file was created... but it was 0KB, containing no data whatsoever.
Anyone have any idea what the problem might be? I'd really love to be able to use this. Thanks!