Right, got it. Deleted the MPU 401, and now the Yamaha works fine with Heretic [it was a Windows error message]. Now swapped the SB16 for an AWE64 Gold [cos I've bought the cables I needed] and it all seems to work fine. I can play MIDI through either AWE64 or the Yamaha, Heretic works. Even played …

Many thanks, that's worked - I can play a MIDI file either on the SB16 or the SW60XG [which sounds better]. Now I can't get music to play in Heretic - when I select "general MIDI" and the address 300, it tells me the MPU-401 device is in use... I guess it will play through the SB16 but I want to use …

I've put one of these in a machine with SB16, but I can't tell whether it's being used or not. The SB16 "speaker out" is connected to the Yamaha "line in", the speakers are connected to the Yamaha. Games seem to sound the same as with just the SB16. How can I tell if the Yamaha is working, and how …

I've got a few PCs set up for this kind of reason - my basic machine for old games is: Gigabyte GA5AX motherboard 768MN PC133 [runs at 100MHz but can be overclocked] K6/2 450 SB 16 + Yamaha SW60XG or SB AWE64 or EWS6WXL [depending on how I feel - I often rebuild here and there] Twin Voodoo 2s so I …