>1920s Victor orthophonic victrola

Groovy! A horn is a differant beast than a pipe.
Here's a neat link that sorta (IMO) tells some
basic pipe theory. If the open end of a closed
pipe has a greater diameter than the closed end....
you loose Q (resonance quotient) .....
http://mmd.foxtail.com/Archives/Dige....11.05.03.html