The RØDE Soundbooth is an innovative and user friendly application that allows you to listen to various RØDE microphones in a professionally recorded, controlled environment. This allows you to see how a particular microphone might sound on a particular instrument, or to compare how different RØDE microphones sound on the same instrument. In some cases you can even select the same microphone on the same instrument but from different distances!
All mic manufacturers should make this sort of applications. Here is an iPad version of it.