Arboreal sound model is based on Halo.

“Arboreal is a pentatonic version of our popular sound model Hyboreal and gamma Oxalis – the sound model of our Stratus. In comparison with the latter, the same arrangement of the tonal field is proposed in a circle, but around the center a third lower step is marked. (All this is also half a step lower).
Where the early morning sun (in G-major) defines Oxalis, Arboreal, with the maximum isolated center firmly in Eb minor. In this context, the circle casts a shadow of the forest wall on the edge of the garden. Still green and alive, and just drowning in the Sun … but leaving with shadows and roots deep into the black, rain-moistened earth. The fifth jump into the circle, reduces the presence of Gb major, which is still hidden inside, but is subject to the lack of a binding with low Gb ( Equinox , will also be present). In the High Arboreal variant, the top note Db rises to Eb to get a two-wave spread. “

Halo Cirrus Arboreal

Halo Cirrus High Arboreal