I’ve got to thank my oldest friend and concert buddy, Tim , for turning me on to this one. Ashnymph is a London band that blends post-punk melodies with Krautrock rhythms and industrial grime. Their debut EP, Childhood , drifts between dreamy vocals buried in layers of reverb and four-on-the-floor dancefloor pounding. It’s a thrilling opening salvo from a band that feels on the cusp of a major breakthrough. Childhood opens with an ambient recording of someone walking down a hall (I think), and some swirling synth noise before the first song, “Island in the Sky” kicks off properly with a motorik beat and bass throb. The thin, digitally manipulated vocals and robotic groove punctuated with bursts of noise, but the big chords of the chorus bring to mind Black Rebel Motorcycle Club’s “ Whatever Happened to My Rock and Roll .” “Saltspreader,” the band’s first single, is next.…