Nice piece, nice voice.
Why do people keep circulating the canard "when the Ottomans took over our chanting became more Eastern?"
I suspect that this perspective is more common among those churches which are ethnically Greek Orthodox and therefore initially Greek speaking church communities. By comparison, in the Antiochian Orthodox Church, the mother churches in the Middle East were first comprised of Aramaic speaking people, and later Arabic speaking people, and thus heavily influenced by Near Eastern culture in the vocal interpretations of the Eight Byzantine Tones used in Church Music. I believe that this has been true since long before the Ottomans came on the scene.
Just my humble opinion.
It's far more likely that the microtonal system was native to the Levant and probably the entire Middle East, and not brought in by Arabs. History would seem to disprove the popular idea that the microtonal system was native to Constantinople, but was adopted to some degree later, since we know the Greeks had a diatonic, and not a microtonal, system long before Christ. See Pythagoras.