Found it, audiophile 2496 english user manual, at the bottom of page 12 :
Thanks for that.
Need to get a new soundcard anyhow as the audiophile is picking up cpu and gpu noise that apperars at analog inputs and outputs. It's just about tolerable on the monitor path as long as I go direct to my monitors but rules out running thru any outboard as it tends to accentuate the problem. I get so much noise at the input that recording is not possible. The thing is almost 10 years old so I guess it's had a decent innings.
Cheers