CEbGBb

CEbGBb is a shorthand notation used primarily in music theory to denote a specific tetrachord consisting of the notes C, E‑flat, G and B‑flat. In functional harmony this collection of pitches forms a C minor seventh chord (C m7), a common building block in Western tonal and jazz idioms. The intervallic structure is a minor third (C to E♭), a major third (E♭ to G), and a minor third (G to B♭), yielding the characteristic stack of thirds that defines the seventh chord quality.

The chord appears in a wide range of repertoire, from classical works such as Beethoven’s piano sonatas to modern jazz standards. In classical harmony it frequently serves as the ii7 chord in the key of B♭ major, or as the iv7 in the key of G minor, contributing to voice‑leading and cadential formulas. In jazz it is often voiced with the root omitted, emphasizing the guide‑tone sequence of the third and seventh (E♭ and B♭) for smoother chord‑scale connections.

Variations of the CEbGBb sonority include altered extensions (e.g., adding the ninth D or the thirteenth A) and inversions, which may place E♭, G, or B♭ in the bass to achieve different bass‑line motion. The chord may also be reinterpreted enharmonically as a B‑flat diminished seventh (B♭‑D♭‑F♭‑A♭) in contexts where altered dominant function is required. Overall, CEbGBb represents a fundamental harmonic unit that underpins much of the tonal and improvisational language of Western music.