But we are talking about PC audio that is dealing with high power components on the same PCB as well. Hardly audiophile territory. 3.5mm will be mostly the same as RCA, its the same signal going through.
The system is, primarilarly, for recording vinyl from turntables.
Get another M-Audio, or try a ZXR
I looked at the ZXR and I get more ins and out's from the audiophile 25/69 I used to have a Delta 66 series from M-Audio but I downgraded to, what I thought was going to be, a simpler solution. And it should be simple. I have the soundcard driver working, it seems, now. There is no longer a X through the speaker thing in the bottom tray but I can't configure the speakers.
Prehaps I have put the question wrong. It's more like; I have a good soundcard but I can't get it working.
As an update I think I have got the soundcards drivers installed properly now. TRhe card is showing up in all the right places in the Control Panel.