Herb,
here are a couple of links.
http://www.hornplanet.com/hornpage/museum/history/horn_history5.htmlhttp://www.csupomona.edu/~dmgrasmick/mu330/EuphoniumTubalect.html
The Wagner Tuba as used by Wagner and Bruckner particularly are bass french horns. They are played by french horn players and always sit with the french horns.
Holst in the planets and Janacek in the Sinfonietta wrote for proper tenor tubas (or euphoniums) and they always sit with the tuba and trombones.
In Jupiter it only bulks out the brass but in Mars of course it has a very important solo. This is never never never played on a Wagner Tuba.
the only reason I am so passionate about this is because I have been waiting and hoping that VSL will include a Euphonium sample at some Point. In the wider musical field it is used far more extensivley than the wagner tuba. the Wagner Tuba only appears in a Wagner and a small handful of other mostly germanic orchestral repertoire.
The euphonimum (tenor tuba) probably appears more frequently. Richard straus wrote an important solo for it in Don Quixote.
The Euphonium (tenor tuba) is used very extensivley in British style brass bands (which can also be found extensivley in europe and New Zealand and Australia) It is also used a lot in American Wind and Concert banda and Military bands all over the world as well as thousands of Tuba/Euphonium ensembles - there s a very very big market out there waiting for a sampled Euphonium.
Gotta dash - off to play Carmina Burana - no euphonium or wagner tuba but a great tuba part.
I'm sorry to hijack Andys thread.
Dave(still panicking)TubaKing