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June 14

MUSIC theory: a strange modulation called [...]

Hi, I know 3 modulations: 1) common chords 2) chromatic with one or more chromatisms 3) enharmonic.

I want to know the name of this modulation:

V 3_4 (Ab-Cb-Db-F) i.e. dominant of Gb major (as a very very short and "not resolved" digression of the main tone Eb minor) > to the II of F minor (i.e. G NATURAL!-Bb-Db-F called "half diminished seventh"). I dont see common chords here, nor chromatisms (Gb to G natural) nor enharmonies. I dont see that fa minor is the tone of the III degree (my Db is the dominant not the tonic). Surely an "avoided cadence"! i.e. a dominant landing to the II (or IV or VI) of a differnet tonality but without any chromatism. What the NAME of this modulation please? I guess that this IS a modulation, not a change of tonality. thanks a lot.

PS: with a *different* dominant like V Ab-C-Eb-Gb all were very easy: a "cadence to the altered subdominant" (G natural = IV# of Db major) and via "common chord modulation" this IV#7 of Db major is = II7 of F minor. ok! — Preceding unsigned comment added by Vastymedoisa (talk • contribs) 02:04, 14 June 2022 (UTC)[reply]

To me, "modulation" and "change of tonality" are synonyms. Also, I don't know if all conceivable modulations have a name. Without further context the second chord seems a bit ambiguous; it is also the seventh of the III of E♭ major, but with the fifth diminished – the D♭ being a hold-over from the previous chord. Not all changes that make an altered note appear signal a modulation. Does it make sense to see this as a digression from E♭ minor to G♭ major to E♭ major, with the held-over D♭ alluding to E♭ minor? --Lambiam 16:07, 15 June 2022 (UTC)[reply]

If it has a name, it would definitely be listed in Nicolas Slonimsky's Thesaurus of Scales and Melodic Patterns (1947). -- Jack of Oz ^{[pleasantries]} 22:12, 15 June 2022 (UTC)[reply]