This is arguably the greatest piece ever written for the flute. It is Francis Poulenc’s Sonata for Flute and Piano. Here it is played by Jean-Pierre Rampal, the flutist the Sonata was composed for:

And here is the master getting funky with composer Claude Bolling (also on piano[1]):

[1] When first performed the Sonata for Flute and Piano had its composer on piano. Unfortunately, I cannot find a recording of it.