I have come to the conclusion that this codec only worked on Macs that used PPC chips,not Intel Macs.Apple must have dropped it when switching to Intel.No where on the net can I find anything about this codec on newer mac OS's and newer Macs.
Judging from this user's comment and others,they are working with OSX10.4 or newer OS that has PPC support like the first Mac Pro and other PPC's.I think the comments below answer my own original question.Hope this helps anyone with the same kind of problem with USB devices that need USB audio CODEC.
In Audacity prefs, I selected:
"USB Audio CODEC" for both Input and playback.
I even tried lower sample rates and such. Record button stays grey and readouts don't show any input whatsoever even though I am sending a signal.
Mac is a 533Ghz g4 (Digitial audio) running 10.4.11
It is plug into a USB port on back of machine.