Keith Emerson’s pioneering use of the Moog synthesizer benefits from the extended high-frequency response. The piercing, aggressive leads in "Eruption" and "Aquatarkus" sound sharp and immediate without inducing listening fatigue.
: The main theme originated from an unusual 5/4 time signature drum pattern Carl Palmer was practicing, which Keith Emerson then built upon with his Moog synthesizer. Emerson- Lake Palmer - Tarkus -2016- -FLAC 24...
Here is a good report on this specific audio release, covering the context, the technical quality, and the listening experience. Keith Emerson’s pioneering use of the Moog synthesizer