Practicing long notes is a good way to warm up. Adding flutter tongue to the note improves your support. This song is also perfect for practicing this multiphonic. What a wonderful feeling when you let those two notes sound at the same time.
Flute Colors arrangements
Sheet music with extended techniques for flute
Here you can buy and download sheet music of arrangements with extended techniques for flute.
Variations on well know flute exercises, traditional songs, but also modern pop songs. From Drouet and Bach to Justin Bieber and Bruno Mars. Have fun with extended techniques for flute!