Since I first saw your post, I've been on a mission to find out if there's a replacement for the venerable Griffin iMic (which isn't supported past Sierra), and I
fiiinally found
Behringer UCA202/BEHRINGER 2 in/2 Out USB Audio Interface with Digital Output, 2 x RCA Phono which
LOOKS TO ME like it's what you're looking for.
Hot damn...that looks perfect. I've already put one in my cart....and I've got the adapters to go from the RCA to 1/8" TRS. Perfect. And the USB connection is icing on the cake. No, wait, more icing....it's six bucks cheaper that the Bluetooth unit that doesn't work.
There may be other solutions, but I've spent so much time finding this one that I'm beat from searching.
Well, if we ever meet I'll buy you a beer or two. Thanks very much.
