mixers
I do not know of any mixers that convert a/d and process in the digital
domain; if they are out there I would guess you could buy a nice house for
half the price! However, I do know there is soon to be released an
"affordable" 8-track DAT recorder, which when coupled with a clean mixer
and synthesizer will produce amazing sound quality! If all you want to do
is mix a. signals with d. signals then you can buy a synch which will allow
you to multitrack your a. signals and "mix" in an original generation synth
output for the utmost in quietness!