Hi Steve, most of the connections are between Mixer and Audio Interface (Ins, Outs, Inserts). I utilize two FX (Alesis Quadraverb -> for Vocals, and Lexicon Alex -> perfect reverb for guitar and snare drum), so to say Veterans of their kind ;). There's also an Roland GP-8 (you know, the Mike Oldfield guitar thing -> even more vintage than the FX's). I tried a few compressors but till now i haven't found one i really like. But there are a few more pedals i use (Like Boss VE-500 for Vocals). In my experience (before the Compressor) microphones have the biggest impact. As soon as i am satisfied (enough ;) with my setup i will do a post on my gear and signal routing. Have an awesome week!