Maybe it's just my STO-2's that have some sort of bass roll off or have otherwise hardened with age. But many a camcorder has better low end than these mics for me. As I look at QTC30 vs. QTC40 vs. QTC50 and how the only visible difference is price and low end response. (and high end too, but most of that doesn't make the deliverable IMO.) And a lot of my small and cheap lavalier style electrets lack low end as well. Trombone / Baritone and higher is just fine for the most part. Anything lower and it catches the harmonics, not the fundamental (all attack, no presence / sustain). Leaving quite an imbalance when a brass quintet has the Tuba playing half the volume of the group in the recording / which wasn't the case on location. I can EQ some of that, but you can't EQ what's not there.
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There's various effects that one can do with lips and wind through a tube. There's a double buzz like what seems to be the accepted technique for didgeridoo. And there's multiphonics where you hum and buzz the lips. For trombone and other brasses, a double buzz is generally a sign of weak lips and generally avoided. Where multiphonics might be an acceptable technique. And various growls with either throat and/or flutter tongue implementations of it. Most of which are primarily jazz techniques. I've done circular breathing like attempts, but it's very difficult to do well. The transition between lungs to oral cavity and back generally changes your pitch and/or volume. Which is to be avoided when sustaining a constant pitch. Not impossible, but not very easy to master. And can be disabled as an available ability with the slightest cold or illness.
But I have a mate who played sax and tuba, he did rather well with it.
