There’s Bb/C 4 Rotary Valve Euphonium I’ve been looking into but never read good reports about intonation. Someone posted one for sale on eBay stating that intonation is not perfect and included following video which is his own recording:
https://youtu.be/tQd1i74SzdY
I have asked him about it and what slides, key of Bb or C he is using and got his response but not sure I understand everything. I’ll post it here maybe someone can help me explain:
“Use a different bar to sound intonationally pure. The bar for Bb and for C is the same. Changing the build is to change the functionality of the pipe.”
When I asked for clarification I got this response:
“I mean I replace some rotors with others.
For example, the tone C instead of 1 rotor plays it with 4 rotor. No customization.”
Here’s the link to his listing: https://rover.ebay.com/rover/0/0/0?m...2F222906164534
PS: Seems like the same design/manufacturer as offered by Schiller: