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Other than the one by Gerard Hoffnung from 1956, are there any audio or video recordings, private or commercially released, of someone playing a subcontrabass tuba (Harvard, Hoffnung/Paxman/Sander, Amati/Kralice, or any other in existence) that could be posted here?

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I was lucky enough to play the Harvard Subcontra last year when I went back east for an audition. I had my parents who were with me take a video of my playing it, but you can't really hear much. The horn itself was a bit hard to play, as it was in a corner and the bell was in the ceiling (making it really tough for any music to get out). I'll upload the video to my youtuba account when I find it on my computer...in the meantime, a picture of me playing it (or standing next to it)