My experiences with Besson compensating tubas is that due to the inherent damping of the anti-nodes of the low notes recycling through the valve block a second time is that Besson compensating tubas privilege tones are problematic at best and simply will not resonate at all at worst and typically. Hence my distinguishing with a sousaphone. Decades ago I had the privilege (pun intended) of playing a pre-WWII Conn 38K, the predecessor to the 20K, but with the standard valve block - the 20K short-throw block had not been invented yet. It was so resonant, you could not tell that the low Eb was a privilege tone rather than a valve tone. Everything from there on down shook rafters and floor joists with only moderate volume and good breath support all the way down to true pedal BBb. That's how strong the fundamental was, compared to many other tubas that sound grainy at that low pitch level. My 36K is not quite that resonant, but you still have to listen closely to hear that the privilege tones are not valve tones.marccromme wrote: Mon Sep 21, 2026 3:13 pmAnd no, I don't want to mess with priviledged tones in Brass Band literature, or in Crespo, at least, I woun't like it due to agility, secure centering and messy fingering issues.
As I posted earlier, depending on the ensemble and the literature, a player may want the extra valve for ease of execution. But yes, you are correct: I don't need it, and I don't want it due to the extra cost and extra weight. If I ever played in an ensemble or literature as you describe, I may reconsider to make sure the passage is executed properly, but not until then.
