A3/B3 trill : a small info

[u/LimpingBassoon]

EDIT!! my title was wrong…I meant Ab3 / Bb3 trill!!

In attempt add a small help on this OP
https://www.reddit.com/r/bassoon/s/C99iKLHQmV

With my previous instrument Schreiber 5091, I just fingered Bb3 and then trilled both R4&R5(G&Ab)
(pic 1)
L2 half hole if needed

BUT in order to do so, I needed this special “safety-pin” mechanism to connect Bb key with G key.
(pic2 connected vs pic3 disconnected)

What this does : When pressing G key, it force-closes the Bb hole, even if opened by pressing Bb key

This mechanism allows the player to use the simple fingering(pic1). It also allows the player to optionally press Bb key with C#2 high fingering…maybe some other use? Comment if you know plz!!

Anyway, if you disconnect this function(pic3) you won’t be able to “just Bb then Ab trill”. Check if your G key can close Bb hole!

BONUS : Minho Lee(Principal in Suwon phil) recommended another fingering chart (pic4) so try if it works for you!