Former Drive-By Trucker Jason Isbell plays Sticky Fingerz with his band the 400 Unit. “Sirens of the Ditch,” Isbell’s debut solo album, comes out July 10. The few songs I’ve heard sound great. Like the Truckers, it’s literate Alabama Southern-fried rawk, but alone Isbell is a little more contemplative and moody. Aquarium Drunkard’s got the stand-out of the track’s I’ve heard, “Dress Blues,” for download.