MisterShafXen’s 26edo notation

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26edo can be notated as a superset of 13edo as follows:

A At A#/Bb Bd B Bt B#/Cb Cd C Ct C#/Db Dd D Dt D#/Eb Ed E Et E#/Fb Fd F Ft F#/Gb Gd G Gt/Ad (A)

An A major chord would be spelled A C Ed and would be called A perfect (m5). This is because Cd is the m3 and Ct is the M3, E natural is P5 from A natural.

A B major chord would be spelled B D Fd.

A C major chord would be spelled C E Gd.

A D major chord would be spelled D F At, which would look like a D perfect (M5). The reason for this quirk is that G-A is 1\13 and not 2\13.

An A major scale would be spelled A B C Dd Ed Fd Gd, with the following key signature: Dd Fd Ed Gd.

See also