tertia

Tertia

Tertia means harmonising a melodic line by adding parallel 3rds to it.

Mozart-Allegro D major

Composition with extensive use of Tertia Quiescenza, that is direct motion 3rds to a melodic bass with a Quiescenza voice (pedal tone) on tonic or/and dominant added. Mozart embellishes this voice with an acciacatura.
Also check ‘Mama’ by P.I. Tschaikowsky. Same technique. When ascending the scale with Tertia Quiescenza, a progression from Tritto 1.2.3.4 to Finale 5.6.7.8 is almost automatically generated (when descending: Reverence 8.7.6.5 followed by Prinner 4.3.2.1).