Inspired by raga music, particularly the work of the vocalist Pandit Pran Nath, Jon Hassell processes his trumpet sound and focuses on notes that change in tiny increments, giving his melodies a slippery quality where you’re never quite sure where they are coming from or where they might go next. The background is filled with quiet twitches of rattles and bells, gurgling talking drum, and snippets of bird songs, creating a bed of sound that is hard to pin down but easy to absorb as a whole.