I once played around with the Kvantum manager qt5 under Xfce to make the Audacious interface a bit more attractive. It worked fine, but now the font in Audacious is a bit too big for a good overall picture. But I can’t find anything in Kvantum itself to change the font size of a theme on applied themes. I would like the font to be a bit smaller.
I found out myself: in the qt settings-manager qt5ct you can set the fonts for qt applications:
Glad to know this - but I should note that Audacious doesn’t quite force you to go with QT… if you don’t mind some determination!
Here how mine appears as at the moment - on xfce as well.
I will save up the info for when I am dragged kicking and screaming to using QT in the future, though 
which theme is that?
Easiest is to post a piece of my conky. Lots of variations on these themes - and can be found on xfce-look and gnome-look.
you can still use the gtk3 version from AUR or set the gtk3 flag and build from the qt version
Haven’t figured out how to make this work as yet (haven’t looked at it much, really) and I have a mish-mash of solutions at the moment. Some of my distros run the AUR (previous version) - some have the upgrade on IgnorePkg - and some haven’t upgraded to the ‘force QT’ version yet! Lots of choices. Guess I should check if the other AUR version has a build flag for GTK in the PKGBUILD (it definitely doesn’t build that way by default!), and I don’t really want to page through the source code looking for the place to set it…
I now have audacious running on qt with the Kvantum Manager. It’s all right, will probably stay that way for now.
I’ve tried it and find it unusable on my screen - that is, with any of the Kvantum themes I have tried so far. In particular, I can’t get the secondary controls to be reasonably visible - and when I get close it fouls up in kid3 worse 
Glad you got it to go, though.
It works, at least everything is clearly visible. I also tried the gtk3 version from the AUR, but meanwhile I find too many settings there.
