Marc Bonilla

Progressive rock is a rock subgenre that expands the genre’s formal, harmonic, and conceptual boundaries. It favors long-form compositions, intricate arrangements, and virtuosic musicianship, often drawing on Western classical, jazz, folk, and psychedelic idioms. Typical hallmarks include multi-part suites, shifting time signatures, extended instrumental passages, recurring motifs, and concept albums that present unified themes or narratives. The sound palette commonly features electric guitar, bass, and drums alongside an array of keyboards (Hammond organ, Mellotron, Moog/ARP synthesizers, piano), woodwinds or brass, and occasional orchestral additions. Lyrics often explore science fiction, mythology, philosophy, social commentary, and introspective themes.

Rock keyboard is a keyboard-centered approach to rock in which pianos, electric pianos, organs, Mellotrons, and synthesizers provide the primary riffs, harmonic foundation, countermelodies, and solos. Instead of guitars dominating the ensemble, the Hammond B‑3 with a Leslie cabinet, Rhodes and Wurlitzer electric pianos, Clavinet funk stabs, Mellotron strings/choirs, and analog/virtual‑analog synths (Moog, ARP, Prophet, etc.) lead the texture. Players draw equally from blues, classical, and jazz vocabulary, often featuring ostinatos, extended chords, modal color, and virtuosic soloing. The aesthetic ranges from gritty overdriven organ rock to symphonic, cinematic layers and synth‑driven arena hooks.