Toral adds layer upon layer of treated sine waves, along with guitar soundscapes and analog electronics. If the piece takes some time to take off, it eventually reaches a gorgeous state of flux where sine waves and guitars fuse into a single complex organism.

Through a meticulous cycle of blends and pans, Toral reaches a powerful sonic density from the tight flux of three or four blank tones rather than a congestion or distortion of the stereo field. The gritty, psychedelic edge that touched Toral's early work is totally absent; instead Harmonic Series seems to develop out of the resulting negative space, a lyric-less tone poem to the information age

Stando alle dichiarazioni de neo-minimalista portighese, il secondo volume dell'Harmonic Series, iniziata su vinile Table of the Elements, è l'ultimo documento di una devozione per il suono continuo coltivata nel susseguirsi di permutazioni di una medesima idea e di una medesima pratica.