Bill MacKay and Cooper Crain run in the same Chicago circles, MacKay tilting, maybe, a little further towards folk and blues and Crain of Bitchin Bajas and Cave leaning harder into krautish experimental drone. There’s certainly plenty of common ground, however, judging from this four-track collaboration, as both work to find magic in still, pooling reservoirs of sound that do not move so much as they glisten in unearthly light.