Verb
(architecture) To raise (the whole ring of an arch) off its centering, by driving in the keystone forcibly.
(music) To raise the pitch of.
(figuratively) To produce nervous tension in.
(figuratively) To raise the intensity, excitement, tension, etc., of.
Source: en.wiktionary.orgWhen you are making a record and if you spend too much time over it, you have to record it a tone lower or cut the tones lower because you can't reach some of the notes, I find this. But when you go on stage, you have to put the key up and it really changes the whole thing. Ray Davies