Having a french tuba I sold my euph long ago, so no chance!
#J.c.S: The idea of the "transpositeur" is: just press number five an play a half step lower in strange keys without awkward fingerings. Unfortunately the most original music for this horn has a lot of sharps written, so you have to think. For me it is easier to finger the right key and have the lowered half-step on five for in-tune combinations with 4 and 6, in quick combinations sometimes with 3 or 12. Yes, and I pulled out my third slide so that I have no difference between my old and new horn.
Brand new on air:
https://youtu.be/sljgjXNUo9Y" target="_blank" target="_blank" target="_blank
The proper fingering chart for tradional layout, just forget all combinations with more than 3 valves over CC (as shown in every chart...)
For my little tuba I have a nice mute from Schlipf (
http://www.tuba-mute.com" target="_blank" target="_blank" target="_blank), it was a prototype he had made for some saxhorn. He was glad to get some money for it and it works great on my Courtois and on my Wessex. It is the Mnozil model, which can be adjusted for playing or as a practice mute and can be transported in the bell. When asked he may produce some more of it.