Music does not exist in one particular note – which is in itself meaningless; or in a lot of such single notes, each in itself meaningless. I am tempted to say it exists more in the spaces than in the notes: the spaces between successive notes in pitch that creates the melody, the spaces between simultaneously sounding notes, that is the harmony, the spaces in time between the beats, that makes the rhythm. But that too is wrong, because the spaces are just silence, apparently nothing. It is not in the spaces or the notes, but in the spaces and the notes together, plus whatever it is that comes about from their union: much as electricity isn't in the positive pole, or the negative pole, or for that matter just in the space between them, or the sum of all those, but in the whole taken together. This is what I mean by betweenness, and it is also what mathematics consists in as much as music.