I have a question about a particular chord in “Regard du Pere,” the first piece in the Vingt Regards Sur L'Enfant Jesus by Messiaen. I am using the 1947 Editions Durand and don’t know of any other source.
First some context. This piece is written using Messiaen’s second mode of limited transposition. If we label pitches C, C ♯, D, D ♯, … B as {0,1,2,3,…11} then the three transpositions consist of the pitch sets {0,1,3,4,6,7,9,10}, {1,2,4,5,7,8,10,11} and {2,3,5,6,8,9,11,0}. An analysis of the chords in the piece shows that with one exception they consist of pitches taken purely from one of these three pitch sets. For example, the opening chord is an F♯ major chord , {1,6,10}, and is taken from the first pitch set.
However, the next-to-last chord in the Durand edition consists of the pitches {0,1,3,5,9} and does not fit into any of the three pitch sets that are the three transpositions of this mode. Given that all of the other chords do, it is natural to wonder whether the Durand edition has an error or not. And, if it is not an error, why did Messiaen break his rule for constructing chords for this one chord? If it is an error my guess is that the chord should be constructed from the pitches {0,1,3,4,9} which fits into the first pitch set and has quite a nice sound to it, but hey, who am I to propose changes to Messiaen’s profound music?
p.s. Doe anyone know if there is some way to view the original score?