Hi Everyone. I'm using an Edirol UA-25 (with a RODE condenser mic) connected via USB to an iBook G4 (Garageband, Soundtrack). The Edirol box indicates that I can connect an analog mixer from the TRS out ports (in addition to a digital mixer from the optical out port). My question is: If the UA-25 is connected to an analog mixer via TRS out ports, how do I get the signal from the mixer back into the iBook? Any answers would be appreciated.