Few musicians truly occupy their own creative lane, but multiinstrumentalist Dave Harrington is cruising along without much competing traffic. After spending years as an indie-rock journeyman, he found a higher calling as one half of Darkside, his ambient electropsych partnership with producer Nicolas Jaar. Now, over five years after that band’s acclaimed debut LP, Psychic , Harrington expands his scope as a solo artist on his second LP, Pure Imagination, No Country— tumbling deeper down the rabbit hole of avant-garde, psychedelic jazz. Not that the record is exactly “solo.” He crafted the material with a slew of experimental players, including drummer Samer Ghadry, vibraphonist Will Shore and synthbassist Andrew Fox. Much of the album feels like it was assembled from lengthy, improvisational jam sessions, à la the copy-and-paste sorcery of Miles Davis’ Bitches Brew— but the songs never feel haphazard, alternating evenly between groove and atmosphere. “Well” opens with a lurching fusion riff and tumbling vibes; the 11-minute “Patch One” stretches its heady ambience into a cascade of wah-wah keys and manic drums. Harrington, of course, is the Miles-like maestro leading the charge, his aesthetic guiding the flow even when he isn’t playing a note. He saves his most chilling moment for the grand finale, a reinvented “Pure Imagination” from Willy Wonka & the Chocolate Factory ; over oceanic synth bass, he rings out a handful of tremolo chords that conjure the tone of John McLaughlin and the tenderness of David Gilmour. He can captivate with 100 notes or, as he proves here, a few.