I'm new to this; I wanted a really simple looper set up where I could apply effects to tracks I've recorded with just a mic or amped guitar, so I'm looking at the Super 8 plug-in in Reaper. I set it up as per this excellent guide https://www.youtube.com/watch?v=hiSTeVlinAg but it seems to be geared towards interfaces with 8 outputs where I'm just using a mic plugged into my Mac (USB and analogue), so when set up I can't select 'input: 8 channel' in the routing inputs as there's nothing to go to, I have to select 'Input stereo 1+2'; consequently I can only seem to record on tracks 1 and 2.
What I'd like to do is record on all 8 tracks of Super 8 looper using just a stereo mic- can someone tell me in simple terms how I set up Reaper to do this.