Is this audio MS3 or MS4?
Is this audio:
in MS3 or in MS4?
If you download this file (it is "Pomp Ans Circumstance, March 1") and try to play it back, the system will firstly ask you to convert it into MS4, which means that originally the score was written in MS3.
However, if you listen to it on the MuseScore website (in the link I provided above), you'll be surprised by its quality. It sounds just as good as original MS4 file. The levels of reverb and the overall sound quality is something that I don't remember having in MS3, especially when it comes to those parts of the score when all instruments are playing together.