Your songs can be heard farther than normal.
You can alter a song with a range of close or medium to increase its range to a higher range category, using the following order: close, medium, and long. Songs with a fixed range have their range doubled, for the cost of 1 MP. Songs with a range of personal do not benefit from this feat.
MP Increase: Special. A reach song costs 1 additional MP more than the actual MP cost of the song for each increase in range category. For example, a song with a range of close increased to long costs 2 additional MP. In addition, the perform check DC increases by the amount of additional MP spent while using this feat.