Is it appropriate, Liturgically speaking, to sing Epiphany hymns during the "Sundays after Epiphany" ?

For all the Sundays? Or none? Or some?

Priest Number 1 says:

sure - it is kind of strange time -= time after the octave of the epiphany until septuagesima -

I think it's still fitting to reflect on the great events of christmastide/epiphanytide until septuagesima

Priest Number 2 says:

The season of Epiphany also marks the beginning of Epiphany Tide, so, I believe yes.

Priest Number 3 says:

Well, those Sundays are like an expansion joint in the liturgical year,
filling in whatever the changing kalendar brings each year between
Epiphany and Septuagesima, or at the end of the year for the extra
Sundays post Pentecosten, as needed. In other words, not much real
emphasis on the mystery of the feast itself, so it seems that specifically
Epiphanical hymns would fit best on the first Sunday and maybe the
second, but sempre ritardando e diminuendo...

Priest Number 4 says:

I would not sing them on or after the 2nd Sujnday after /epiphay, i.e. when the priest starts wearing green vestments, since the Epiphany season is over.

As the melody may be difficult to find here is the hymn Alleluia dulce carmen re-typset using Caeciliae, we have also sung it to another dominican melody and I could post that melody as well if anyone is interested;

Here is the above Hymn set to one of the many very beautiful Dominican melodies, please note this is not (as far as I know) a Dominican hymns so it is a novelty to sing it to this melody.