aA bA cA dA eA fA gA hA iA jA kA lA mA nA oA pA qA rA sA tA uA vA wA xA yA zA[ C/U ]   music   plural A’s or As in Western audio, the sixth note in the scale (= series of notes) that starts about the Notice C, or perhaps a set of notes dependant on this Be awareWhen the ancient Greeks adopted the alphabet, that they had no use for any letter re