Ypakoe The Ypakoë (, from the verb , "hearken" or "give ear", to "respond"; Slavonic: Ўпакои) is a troparion chanted at Orthros (Matins) and the Midnight Office on Great Feasts and Sundays throughout the liturgical year in the Eastern Orthodox Church. The Ypakoë which is chanted on Sundays is found in the Octoechos and there are eight of them, according to the Tone of the Week.