I have the FF400 and just loaded the most recent driver. Mac Mini 10.5. Using outputs 1 and 2 of rear panel. Choose L1. -10 dB in Settings, Audio Device for analog outs 1-6.

The computers volume control is being used (digital?). I thought it would be disabled as the FF400 shows up in Audio Devices in the Audio MIDI Setup. The iTunes volume control stays at 100%.

I'm using the preamp and DAC for now with the powered speakers to listen to iTunes. It sounds pretty good. I think I may have missed a step though, because the computer's audio control is active.

Sorry for such a basic question.

jackiejr