A relative system for naming pitches according to their position in some scale. For Western music, seven scale degrees are commonly identified. For the major scale, the most well-known names are the "solfa" syllables: do, re, mi, fa, so, la, ti. For both the major and minor scales, theorists use the names: tonic, supertonic, mediant, subdominant, dominant, submediant, leading tone, or more simple, the numbers 1^, 2^, 3^, 4^, 5^, 6^, 7^.