The name of the sixth tone in the model major scale (that in C),
   or the first tone of the minor scale, which is named after it the scale
   in A minor. The second string of the violin is tuned to the A in the
   treble staff. -- A sharp (A/) is the name of a musical tone
   intermediate between A and B. -- A flat (A/) is the name of a tone
   intermediate between A and G.