Music of Ancient Rome and Greece

[Tib. Gabinius]

I don't know how accurate these reconstructions are, fanciful? Reminds me of the reconstructions you eat of Roman food that tastes like so much mush. The atonality may not be right, and yes, so much sounds like droning of monks, and far too mournful.
Anyway, what there is of Roman musical notation is found on, far as I know, one scrap of papyrus in the Univ of Michigan collection
Roman Music Notation Papyrus with sounds
They also have an online exhibit: Roman music exhibit

Of whom are you talking? There are now 4 or 5 different groups called.