Comprised of Eric Freda (Wigwams), Michael Friedrich (Rahim), and Phil Sutton (Rahim, Wigwams), post-punk trio Heatmap recently released its debut EP Pulses, which was recorded by Uniform Recording’s Jeff Zeigler. Standout, “Again,” flows with a bass-pulsating thump. And with that pulse identified, devious, yearning vocals and jaggedly measured guitar licks produce a danceable air of mystery.