Modal fun in C to be had with these backing tracks. I think a good test of how well you know your modes is whether you can play the 7 modes of the major scale from the same root. You can practice all of your modes from the note C with these backing tracks.

The legendary guitar book ‘The Advancing Guitarist’ by Mick Goodrick urges readers to practice to modal vamps. I made some tracks to suit this kind of practice and they can be found here for you to download.