Droneo, two reeds beating 50 cents apart, later joined by phasing 4/3 and 9/8. you really have to listen for a much longer time than this recording to get the phasing to be perceptible!
Droneo 1.4 can randomly weave timbral changes into a continuous stream. This is just four voices, blending harmonics from 16-32 of a C2 (130.8 or so Hz)Run through Droneo's native chorus and Vandelay. Sorry it's not in stereo!