Quote from: svenlarsson on Apr 12, 2017, 03:30AMWhy would they build trombones in Bb F Eb in 1500?
Good question. The books in my library tell that the ordinay sackbut (actually called trombnoe) was tuned to A.
Bass in E or D, alto In E or D. That is why we often play reanasance musi in 465, the Bb is the an A.
So I play my bass ackbut tuned to modern D and play it as being in Eb.
I think that is the answer. A was the logical start of the alphabet. Trombones were in A, which is now Bb.
There is also an argument that trombones just naturally work well in Bb with the bore diameter usually used, unless you go to big. That sort of makes sense, but doesn't explain why trumpets and tubas, etc., would also be in Bb.
There is a US tradition of a Parson's or Preacher's trombone in C. The reason given is that it would make it easier for unsophisticated musicians to play out of a hymnal. That doesn't make sense to me on several levels, but I don't have a better theory either.