Deeptone
Deeptone or tragicomical is a 5-limit temperament that tempers out the comma 177147/163840. It is generated by a fifth (~3/2), which is typically sharper than in 7edo but flatter than in flattertone (approximately 686-691 ¢). The ~5/4 is reached by eleven fifths octave-reduced, which is an augmented third (C-E#). A characteristic feature of deeptone is that the syntonic comma is tuned negative, represented by a diminished unison (C-Cb). This means that ~81/64 is a submajor third, tuned flatter than ~5/4, and ~32/27 is a supraminor third, tuned sharper than ~6/5. When properly tuned, it features MOS scales of the families 2L 3s, 5L 2s, 7L 5s, 7L 12s, and 7L 19s. It has high error because of its flat tuning of 3/2, although the well-known Mavila temperament has a 3/2 that is much flatter still.
See Syntonic-chromatic equivalence continuum #Deeptone a.k.a. tragicomical for technical data.
Etymology
Deeptone was given by CompactStar in 2023, referring to the temperament featuring fifths even flatter than flattone. Tragicomical was allegedly given by groundfault no later than 2023.[1]
Notes
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