Originally Posted by ADziuk

I would much rather hear a live pianist with a trumpet than a recording with a trumpet.

Besides, I don't think you guys know your music history very well if you are that much of a purist. Bach, Handel, Beethoven, etc. all took many of their own works and rearranged them later. Also, often they took each other's works and rearranged them later.

Is Ravel bastardizing Pictures by orchestrating it?
In fact, in Bach's time, small orchestra parts and organ were often interchangeable. Small ensembles would often not even have specific instruments designated. Many later composers took whole sets of Bach's music and re-arranged them into small group works from his keyboard works and vice versa.

Honestly, it isn't a really big deal. On top of all this, the other parts in Brandenburg #2 aren't nearly as difficult to the other instruments as our part is. Add in that some research shows he specifically MAY have written that concerto with a nearby famous trumpet player in mind(Either one in the Prince's court or in a nearby guild) and it really becomes even more appropriate to make an arrangement for trumpet and piano.