I made an internal audio mixer that levels the CD audio and Amiga audio.
The problem with mixing the two is the power output is extremely uneven. Well, the internal cd-audio that is If you play only the amiga audio, it barly comes out cause the resistance is lesser going towards the cd-drive. But when you play the cd-audio, it so over powers the amiga audio that you can barly hear your "FINISH HIM"s.
So I found and leveled the resitance levels, put a volume control on the CD Audio, and mad the whole thing internal on a card face plate.
I called it the Audio Inny. I was going to make a shell for external use (500, 600, 1200) and call it the Audio Outy.
I showed off the prototype at Amiexpo in Baltimore a year or two ago and got alot of interest but school and lack of funds keeps me from actually polishing and producing it.
If you really want, I could dig out my notes and you can build one your self.
J-Golden
PS- the hacks on aminet and the Mr. Hardware versions don't have any volume controls in the specs......