[teto]

Glad to see Richard Bobo's subcontrabassoon being represented. I've followed his project since he started nearly 10 years ago, and the results so far are exciting.

From what I can find, Jared de Leon's octrocontrabass clarinet is taking a backseat for his other projects, many of which are just as intriguing.

Speaking of which, the saxophone family is again out of depth in the subcontrabass register. A low A subcontra only gets you down to concert G0, while both of the above attempts will eclipse it by at least a minor sixth. I would have been content with that G0, but apparently one of the Brazilian low saxophone manufacturers didn't think so and actually made an octocontrabass, one octave below the contrabass. Kudos to @Robert Glogowski for bringing this to attention in another thread.

I couldn't believe the title at first, but there are multiple concert F0's in the first clip fingered as a low D. It exists.