Lately I've played the Euphonium a bit for a school ensemble. A bandmaster said "That's a bad move. It will ruin your tone bug my music teacher said "Playing with bigger mouthpieces can help increase tone, as its completely different as opposedto playing French horn cos its a similar size but different'. I've also noticed I thinky tone and range have improved recently. Coincidence? So what do you reckon on playing other instruments?