CEbGb

CEbGb refers to the three pitches C, E-flat, and G-flat. In music theory this forms the C diminished triad, a three-note chord built from a root, a minor third, and a diminished fifth. Specifically, C to E-flat is a minor third (3 semitones) and E-flat to G-flat is another minor third (3 semitones), giving C to G-flat a diminished fifth (6 semitones).

In enharmonic terms the same pitch-class collection can be spelled C-E-flat-F-sharp, but the spelling C-E-flat-G-flat preserves the diminished fifth relationship and is preferred in analyses that reflect the chord’s function within a key.

Inversions produce E-flat–G-flat–C and G-flat–C–E-flat, which retain the same chord quality but place a different note in the bass.

Notation and usage: the triad is commonly written as Cdim or C°. It contains no seventh unless extended to a diminished seventh chord. Diminished triads are typically used to create tension within a progression and often resolve to a more stable harmony, such as a tonic chord. They appear in classical harmony, as color or passing chords in jazz, and in various film and contemporary scoring contexts.

Relation to broader theory: while the diminished triad itself is symmetrical in interval structure, its function depends on context and voice-leading within a key, and it frequently appears in conjunction with longer diminished structures to intensify harmonic motion.