Dealing with switching between tubas of different Keys

[opus37]

I have specifically avoided playing anything but Eb to keep from getting confused. Then I started playing french horn parts on an F tuba and euphonium in treble clef. Things were going well until I ran into a euphonium part in treble clef with 4 flats in the key signature. Adding the 2 flats for transposition to Bb that's 6 flats. Then, because I still think Eb, it is really 7 flats to me. I did not do well on that part the first few time through.

[Tubaryan12]

Either stick with it until you can or transpose the music. There is no trick, other than to put something on the bell of each horn to remind you what key you're in if you can't remember.

lol. Whenever I have to play a treble clef euphonium part, I have the woman next to me remind me before I start that it's treble not bass clef. Once she says it, I never think about it again.
At the end of the day, the less you are thinking about it as you play, the less mistakes you'll make. Your mind knows where to go. Don't get in the way.

[tubalux]

Finally, when an ENTIRE ENSEMBLE has memorized a piece of music and made it "their own", THAT (though rarely seen today) is EXTRAORDINARILY powerful...ex: Mnozil, et al...

https://www.youtube.com/watch?v=6qUCDs93X6s
Here's Zoltan Kiss of Mnozil with Sarah Willis.
Around 17:00, he explains that he had always learned from written music.
When he joined Mnozil, he was given videos so he could learn his part.

I heart Horn Hangouts!