HI Saint. I have the two 7800s, one was AV modded and you went thru with me on twitter about the resistors as it was directly fed so I reinstalled the resistors and a RF 7800 that is not modded at all. The same results occur on both consoles. Pokey, TIA and YM music all work just fine except that weird volume issue on Rikki and Vikki that I highlighted the other day.
All of the volumes are set up on Max, both global and on running the file.
Ps. Sorry I feel like I'm a pia with these issues.