Enharmonic Perpetual Canon for Choir and Orchestra.

The basic framework for this canon has been in the works for more than a month now, as the technique I employed in the latest one in order to have all voices enter in every diatonic transposition of the same motif turned out to be contrapuntally insufficient.

This time, in order to account for more viable ranges both in instrumental and choral settigs, I reduced the number of voices to 6, even though the core parameters still remain: every voice enters one fifth below the previous one, and instead of diatonic transpositions being treated as though in the same key, every transposition is essentially a real answer throughout, with the integrity of the main theme's melodic intervals kept intact.

This entire setup (alongside certain variations when it comes to the disposition and order of entry of each voice so as to accommodate for the instrumental and vocal ranges of the woodwinds and the choir respectively) gives rise to a distinctly chromatic environment of constant modulation leading to a 2nd iteration of the same canon one tritone higher, at which point it keeps rising to meet the octave above and every voice alternates a divisi to prevent the melodies from climbing even higher and thus, yielding a perpetual canon (with a coda at the end for good measure).

Lastly, the lyrics in Latin sung by the choir are intended as placeholders with thematic and allegorical significance towards the spirit of the canon itself: "Rosea surgit aurora, Sol fulget in caelo - Aurea cadens vesper stellarum tegit noctem", which would roughly translate to "Dawn rises rosy, the Sun shines in the sky. Evening falls golden, covering the night in stars." Not profound by any means, but simple enough to reflect the perpetual motion of the canon as an allegory for the unending passage of time.

YouTube video link: 

Edited August 7, 2025Aug 7 by Fugax Contrapunctus

Reminds me of Pärt's Cantus in Memoriam of Benjamin Britten, only that it ascends instead. 

Please consider adding metallic percussion for punctuation and/or  harp for arpeggios too.

Hi @Fugax Contrapunctus!

Very cool idea!  I actually do something like this harmonically speaking in my Variations on "Deck the Halls" for Piano and Orchestra.  I cycle through the whole circle of 5ths twice over before returning back to the home key, although it's not a canon.  Very effective orchestration here, starting with just strings, adding woodwinds and then introducing the choir - very multi-dimensional approach to a simple repeating canonic structure.  Thanks for sharing!