San Francisco-based producer Aria Rostami is interested in more than just music. Pulling inspiration from the “interlocking communities and climates” of his greater surroundings, Aria crafts visceral, IDM-touched productions like the astral “Ankou,” a cut from his hypnagogic Decades/Peter LP for Crash Symbols (available now on Bandcamp). The track rushes in with ambient field recordings and aquatic soundscapes before giving way to a heavy sub frequencies. Patchy, twinkling synths apply a sensitive and convivial touch to “Ankou”‘s loosely plotted skitters and wisps.