noun
1.
a. : philharmonic pitch
b. : international pitch 2
2. : an unusually high state or degree of fitness, training, or tension (as in preparation for a concert or athletic contest)
an intensive bit of work done at concert pitch — Ngaio Marsh
a man with energy enough to bring up my plays to concert pitch — G.B.Shaw
it's not easy to keep a filly at concert pitch from May to November — G.F.T.Ryall