i already picked up the coax cable with rca connectors from jandr a few days back, unfortunately it didn't state what the ohm's were for the cable anywhere on the packaging
If the packaging said it's a "digital" cable, it's 75-ohms.
this cable did work when i plugged in coax out from my dvd deck>optical rca in to the deck.
Impossible. You
cannot run a coax output from your DVD into an optical input on your DAT deck without a digital format converter of some kind. I suspect you actually did this:
DVD deck RCA/coax output > RCA/coax input on DAT deck
You just want to do the same thing with your DAT and soundcard, now:
DAT deck RCA/coax output > RCA/coax input on MiaMIDI
Once you have these two devices hooked up properly - and the drivers updated and your software configured correctly - you should be able to transfer from DAT > PC.