Posted by Clarification on September 22, 2003 at 17:00:50:
In Reply to: Sousaphone Rotary Valves posted by SHS Tubamaster on September 22, 2003 at 10:05:31:
I meant thumb-operated rotary 4th valve, like the thumb operated rotary fith valves on many CC tubas. No one said such a horn would be used on the marching field, but it might have its uses there.
SHS"that Martin does look interesting, though"Tubamaster