Two artists split a double-A single, exploring both sounds and their structure in their own unique ways. 'Manifolds' sees Jessica Ekomane dive so far into polyphonic writing processes she reaches 'multiphonic', with different sonic voices, sources and timbres no longer on parallel trajectories, but eventually splicing into something closer to a human chant than most ritualistic tunes we're heard in a while. The effect is staggering. Laurel Halo then presents 'Octavia', which is best described as a kind of collage of beautiful harmonisation, a series of melodic motifs and textures that form small wholes, dissipate, reappear, merge, are all aurally connected but never combined. Highly technical stuff on the part of both producers, the coherency between the two is impossible to miss, making for a unique but coherent ambient-drone gem.