Sorry, I couldn't find an answer yet. Ad/da Conversion: I assume the signal from a microphone goes through the pregain and is then converted a/d. When it is send to the DAW through a firewire interface in the slot, it is therefore not converted again, because from the beginning it stays digital? And when we bring it back from the DAW there's also no conversion happening? So therefor there's also never any conversion happening at the input and output-points of the internal effect units like the compressor? The signal only gets converted to analog right before it leaves the outputs for the speakers and headphones? So a firewire card in one of the slots is never working as an ad/da converter? An internal ad/da converter is doing this? Latency: Does it cause less latency to use the internal compressor for the headphone mix of a musician than using a simple stock-plugin-compressor in logic? If so: why, just because the mixer effect works more quickly by itself? Or because the processor of the mixer is more "dedicated"?