Undefined is a truly somber work. If extreme drone and minimalism are your thing, then you’re in for a treat. Oscillating in the mid-range frequencies, the tones remind me of a Tibetan singing bowls or reverberating crystal wine glasses. At times a higher pitch will enter the stereo-field, cycling between the channels, simulating a self-inflicted tinnitus via its sonic hallucination. (read Headphone Commute’s amazing review / recommendation piece here & buy Undefined here)