On Teengirl Fantasy's new LP Tracer, the Oberlin-rooted duo of Nick Weiss and Logan Takahashi add a significant stable of vocal cameos to their live-mixed, unfurling electronic dance music: Catch Panda Bear on on "Pyjama," Kelela's Dirty Projecting harmonic pirouettes on "EFX," Laurel Halo spaced-out syncopations on "Mist Of Time," and Romanthony (the voice of Daft Punk's "One More Time") ...