What is the fine-grained topic of the following text: Turning the energy back down abruptly, Rostam lays a foundation of pulsing high pitched piano and light jazz swing beats underneath labored sighs of the baritone and scattered bass plucks as Leithauser channels inspiration from old school soul singers and croons softly as the song fades into the night. Only return the topic.
Review of a music piece featuring Rostam and Leithauser.