Just messing with the 291k tenor. I think the issue - in MY horn at least - may be certain keys in combination with each other.
- On middle finger F#1: I hear a slightly duller timbre than on fork F# and feel some extra vibration in Bb-bis.
A lot of bises aren't quite tight to the bridge linkage on F# that makes fork Bb, and as a result, the cup has a little motion in it. You can tell if you touch the bis while playing fork and the Bb changes timbre.
- On E1 (sometimes): there's some extra vibration in trill G#, as if it's buzzing the G# cup THRU the lever.
This might be a bigger issue as the G# trill is "positive" - meant to OPEN G# and not CLOSE it, as it does on older horns. It might be able to buzz G# out of seat on every note below.
- On middle finger F#1: I hear a slightly duller timbre than on fork F# and feel some extra vibration in Bb-bis.
A lot of bises aren't quite tight to the bridge linkage on F# that makes fork Bb, and as a result, the cup has a little motion in it. You can tell if you touch the bis while playing fork and the Bb changes timbre.
- On E1 (sometimes): there's some extra vibration in trill G#, as if it's buzzing the G# cup THRU the lever.
This might be a bigger issue as the G# trill is "positive" - meant to OPEN G# and not CLOSE it, as it does on older horns. It might be able to buzz G# out of seat on every note below.
