You don't necessarily need an insert point to connect a compressor. You'll need to set up what input channel your DAW is sending to the line out ports, but that is easy enough. For you this example, you'd want to send input 1 to line out 1. Here is an example of the signal flow for running through a compressor: Mic > XLR mic input one (adjust input gain to peak at around -15) > TRS cable line out 1 > TRS input channel of Warm Audio > Warm Audio TRS line out > Any channel line in on the Quantum > Select this as the input source on a DAW input channel strip. Adjust output gain of the compressor to that the DAW channel strip is peaking near that same -15. Now record your vocal. Voilá.