[ C/U ]   new music   plural A’s or As in Western tunes, the sixth Notice in the scale (= series of notes) that commences over the Observe C, or even a set of notes according to this Take noteIn X-SAMPA, ?a? is utilized for the open up front unrounded vowel and ?A? is used for the open up back unrounded vowel.a : the 1st letter of the English a