Ancient and early music is not one of my main interests, but I found the following documentary on YouTube fascinating.
First choral performance with reconstructed aulos of reconstructed ancient scores of Athenaeus Paean (127 BC) and Euripides Orestes chorus (408 BC), with the evidence presented and explained by Professor Armand D’Angour, Jesus College Oxford.
I found the discussion about the double pipe tuning particularly interesting. The construction of each pipe is such that they aren’t fully chromatic. By tuning each pipe a half step apart the piper is able to play a melodic line that would not be possible otherwise.