My god this too surreal!! I played a soprano (2-valved tumpet keyed in G) for years in the 70's, quit then just got back into playing with a Sonare Bb trumpet. I've been playing with embouchure settings, mothpieces and generally trying to enhance my technique from the 70s. At the same time, I kept hearing this voice that I should play trombone. I thought it was because one of my buds is a pro trombone player, but also because I was getting tired of trying to be a screamer again, trying different MPs, but always that voice. Then today I find my way into Nick Drozdoff's site where he has different demo videos of technique etc. Then I get to one where he demos a bass trumpet. I say what the heck is that, I've never seen nor heard of one, then he proceeds to play it with a Yamaha trombone mp. It sounded like a barihorn (cross between a baritone/trombone and a french horn). I fell in love and realized it was a synchronicity, that I saw the link to his site and saw the video, like the answer to the voice. I did some research (which also led me here) and apparently it can be substituted, if need be as a valve trombone, depending on the music. What I also like is playing in treble clef and not having to learn slide positions or converting to bass clef. Thanks for the post euphmaster.