Kal, Thought you might be interested. When the Delta Signal Modulator is engaged to send a signal from, say, the front right to the sub, all channels are modulated. In my case this mean DSD files are converted to PCM and back on all channels. While I love the functionality of the Procedural EQ, the loss of musicality due to all this digital conversion has me using it very sparingly—only for a few multichannel mixes that can be improved. Here is a link to the discussion I had with John if you are interested. Procedural EQ Mix and Delta Signal Modulator