So my new trick involves using a rack, 2 senderellas, and the Tracktion EQ. I set it up so the rack feeds the inputs on senderella (set to send mode). The outputs from this instance connect to the outputs on the rack. I then place the second instance of senderella in receive mode and connect it's outputs to tracktions EQ. I set the EQ to phase invert, then attach the EQ's outputs to the rack's output. I then place this rack on a track that I'd like to adjust.
Since there is no latency with the send, the audio just cancels and I hear nothing. I then grab the EQ and create my notch (Max out the Q) then go scanning the frequencies (cutting, not boosting). I find it much easier to identify mud this way. Since T tells you the frequency you are looking at, I jot 'em down... then I remove the rack, load up my prefered EQ (EQium, tho I use T's native EQ sometimes as well)... and cut those frequencies that seemed at bit undefined.
Anyway, just thought I'd share... it's just easier for my ears to identify sounds I don't like starting with silence... it's probably not the way to do it, but whatevers...
Once again, I've figured out a way to do something simple in a complicated manner. 
That being said, T doesn't natively have a band-pass... so I s'pose in that sense it might be useful.
