this is my fist instructuble so please rate and ask me any questions about french horn, cello, piano, or any thing.
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press all 3 rotors down half way (trigger doesn't need to be down)
buzz from low to high, then back to low, depressing valves all the way way down at random times, but ALWAYS keep at least 1 valve halfway down. this takes some practice, and i hope to post a video soon, but once you have it, you will think< wow, this is easy