A.Yes, the FA-66 be used on its own without being connected to a computer.
You can use the FA-66 alone if you connect an AC adaptor.
In this case, the FA-66 will function as a mic preamp and a simple mixer.
The input from INPUT 1 - 4 and OPTICAL IN 5 / 6 (digital input) will be mixed and sent from OUTPUT 1 / 2.
(2005/06/22)