From tau 620; see also omicron 573. (For Alexander see already alpha 1121, and again alpha 1123.)
[1] A nomos (in this context) was "a specific, nameable melody [...] sung or played in a formal setting in which it was conventionally appropriate: a sacrifice, a funeral, a festival competition, or a professional display... [T]he nomos of Athena...was probably a standard item at the Panathenaic musical contests" (M.L. West, Ancient Greek Music (Oxford 1992) 216). In the same specialized context the adjective orthios signified a particular rhythm: see West 156-7. West also collects evidence (352 n.119) for the orthios nomos as played on the kithara (kappa 1590). That Timotheos played it on the aulos may be the point of emphasis in the present entry.