I use Guitar Rig 7 in Garageband, and the sound output works fine, but for some reason I can barely adjust controls in the plugin app. Knobs will only turn 1/100 or 1/10 at a time, and many times won't go past 1/10th of a turn (just sticks after that).
So I used the standalone for a while because it allowed me full control of knobs and sliders. I could make the adjustments I wanted, save the custom preset, and then use that in Garageband. Yesterday out of the blue, the standalone app stopped making output noise. You can hear the guitar no problem, but it's a standard dry, unprocessed sound.
I'm using Scarlett 2i2 v.3. No changes to anything on the interface. I've tried making a new aggregate device in the audio setup, but no luck.