With the new album "Climax", Decadent Heroes captures the precise sound of an artist exhaling after holding his breath for an eternity. Italian musician Luigi Chiappini has spent years building this instrumental rock project, using his electric guitar as a leading voice. Here, he reaches the exact point of creative evolution where a player abandons the exhausting pursuit of external validation. He trades showing...

There is a peculiar kind of engine at the heart of "Half Evil" by Tomato Soup, and it runs not on gasoline but on disorientation. The Denver six-piece calls their sound "Motor-Folk," and it fits. The track has the chugging, forward-moving momentum of a vehicle, yet it seems to be driving through a landscape seen in a fever dream, where the signposts are all...