No. Pius XII officially allowed orchestral instruments in his December, 1955 (?) encyclical on the topic.
Prior to his authorization, of course, the instruments were used, by Bishops who were frankly disobedient. (This goes to show that disobedience-by-Bishop is not exactly new.)
If you're close to LA, go hear Paul Salamunovich's church choir and organ. He's at North Hollywood...
Yes, I'm in LA. I followed murphE's links from an earlier post and made my way to a Una Voce Los Angeles chapter. They listed when and where the Latin Masses are in the LA area. Does Salamunvich's parish have a Tridentine Mass?