Apolytikion tis Pentikostis
arr DWS from the Byzantine chant
This composition starts with the original chant and then progresses, in this first version, to a polyphonic interpretation keeping the original rhythms, with harmonies reminiscent of John Taverner. For the final - somewhat more extended - repetition, the measure is kept in 6/4 time and the basses provide a Western style ostinato while the original themes weave in canon above them.
A simpler (homophonic) version has also been written for a group in Totnes, (Choros) who will be singing it in Greece some time soon)
The performance, by the composer here, is transposed down a third.
The scores (of both homophonic and polyphonic versions) can be downloaded here
I would be interested to know of any other performances.

Transliteration
Evloyitos i, Khriste o Theos imon
o pansofus tus aliis anadixas
katapempsas avtis to Pnevma to Ayion
ke dhi avton tin ikumenin sayinevsas
Filanthrope
Dhoxa Si
Translation
Blessed be you, O Christ our God
Who showed the fishermen to be most wise
you sent the Holy Spirit upon them
and through them you caught the inhabited world in your net
O Lover of Mankind
Glory to you.