TTBB

In musical choral notation, TTBB denotes a four-part men's chorus. Its configuration is Tenor 1, Tenor 2, Bass 1 (Baritone), Bass 2.

The Tanunda Liedertafel 1861 employs this method of notation in their music.

Typically (but not always) the 1st Tenor part is the melody, with the other parts as harmony(s).