I have been trying to work out this issue for awhile now. I have my ssl alpha channel set up via spdif to my fireface 400. I am trying to run a recorded mono bass track thru the alpha channel to add some analogue harmonics and I cant figure out how to do this. I used the logic i/o plug and had the inputs and the outputs going to the alpha channel. There is no signal going thru the alpha channel, please help!!!!!