Flute octaves

No tunes, just trying to extend my range. Practiced C,C’,C'’,C”’(no chance), ditto D and E to get the top “altissimo” fingering and training my lips’ muscle memory. A bit of success toward the end jumping up and down the octaves, finishing with a sketchy chromatic scale from bottom C to high E and back a couple of times–all in one breath…not!
(30mins)