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by carey 557 days ago
You have a fencepost error; the notes in Western music in equal temperament are C, C♯/D♭, D, D♯/E♭, E, F, F♯/G♭, G, G♯/A♭, A, A♯/B♭, B, then c an octave higher is the thirteenth.
1 comments

Ah thank you for the correction, I'm just a hobbyist and have not practiced in a few years
It’s accurate to say that there are twelve intervals, anyway, which is the point you were making.