This was posted to the Tuba-Euphonium Facebook page as well, but I thought it would be nice to share this great project here as well!

Hiram Diaz of the President's Own has uploaded a series of play along videos for the Rochut etudes. He's performing the Counterparts composed by Tom Ervin.

I've linked the first few videos below, but you can find the rest on his Youtube Channel. Counterparts 1-10 are up now, and it looks like eventually he'll have the first 20.

https://youtu.be/_iQFosxjym8

https://youtu.be/4cNbbfaD23Q

https://youtu.be/dC1IG2E_kpY