revert
In music, two octaves plus a semitone equals  .
Dear Dicklyon,

I agree with you that without a RS we should not include a lot of text on this. However, even if I cannot find a RS right now, the fact cannot be in dispute since it is as valid as 1+1=2, for which I would not know how to find a RS. Could we not agree on including this one sentence in the disputed sightings section, hoping that someone will find this knowledge useful and/or will find a source for it? We could attach the {{fact}} tag, if you like?   ♫☺♥♪ (talk)