I'm running the spdif rca output from an Asus P6B motherboard into a v-dac. My playback control for the spdif (running windows 7) has a volume control. What volume level for the spdif is appropriate for input to v-dac? What exactly does 'volume' do in the spdif output? spdif is a digital format, so does changing the volume simply change a number representing volume in the spdif stream or is signal level altered?
thanks in advance, markus