(Conor Byrne) Ball of Wax, if you don't know (shame on you!), is local musician Levi Fuller's "audio quarterly," which he deftly curates into themed compilation albums and live shows—from the "Parental Advisory Edition" after George Carlin died, to the Paul Constant–cocurated "Songs About Books," to the most recent "No Guitars." They are charming and clever experiments. And then sometimes the theme is just good local music gathered together by a smart dude. That's what this next one is, the 30th installment, and it's sure to be as wonderful as ever.