More commonly used than the diminished triad is the diminished seventh (d7),Īlso called the full diminished, which adds a double flattened Triad always starts on the seventh degree of the scale because of the wayĭiminished triads are not the most attractive-sounding of chords and are In practise, the diminished triad is considered dissonant (see dissonance)Īnd unstable because the diminished fifth splits the octave right down the For example, B dim = B D F (there beingģ half-tones between the B and the D, and another 3 half-tones between the For example, a perfect fifth is an interval of seven semitones therefore, a diminished fifth is an intervalĪ diminished triad is a triad which contains a root,Ī minor third, and a diminished fifth – in other words, a root with two minor thirds stacked on top (orĪ minor chord with a flattened 5th). Reduced in pitch by a half-tone (semitone). A diminished interval is a perfect or minor interval that has been