What key is it between semi tones?

Question

I dont really understand what key a song would be if its sped up and it ends up between two semi tones. For example, what would be inbetween C and C#? Too confusing to put into words but someone smarter than me pls explain 🙂

In: 1

Answer 1

Each tone corresponds to a certain frequency. In western music we all kind of agreed that tone A is going to be 440 Hz and that we’re going to split the octave (octave = doubling of the frequency) into 12 distinct notes (C, C#, D, D#, …).

So for example, A = 440 Hz, A# = 466 Hz. B = 493 Hz, and so on… But that doesn’t mean the notes in between don’t exist. We just didn’t give them a name, and we generally don’t use them in music, that’s all.