The lowered first note ( tonic) in the C major scale. This pitch has no solfeggio representation because the actual pitch is the same as the subtonic or seventh note ( B) in the fixed do system. However, the note name C-flat is necessary in certain instances such as the key of C-flat major where C-flat is the first note, or tonic, or A-flat minor, where C-flat is the third note, or mediant. The frequencies of the audible pitches of C-flat are notated below. See also [Eng.] C-flat; [Fr.] Ut b'mol; [Ger.] Ces; [It.] Do bemolle; [Sp.] Do bemol.