This one might fall under user error, but I can't get any sound out of the limiter on the master buss. I can bypass it and hear my tracks, but that's not what I want of course. I run AVLinux 6.0, Ardour 2.8.16 and Ardour 3beta5.
I have a problem in 0.0.19 with all the gain reduction meters where the do not show any gain reduction. Sound processing is working although.
Everything works perfectly well under Calf Jack Host.