Posted by Tom Caudron on February 14, 2000 at 09:44:45:
I was looking a friend's double French horn and wondered if there had ever been a successful attempt at making a double tuba: pull a trigger and you'd which in a different set of valve branches plus change the overall tube length for the key change.
If you've heard of one or know of a book or web site where I could find info, I'd appreciate knowing about it.
Thanks.