Theodor Rombouts - The Lutte Player |
1) It shouldn't be recognizable. Your Player Characters should not be able to recognize the music from a popular video game, movie or other. Not to say that this music isn't well done, but your PC will immediately picture the setting this music comes from.
2) Cannot be overpowering. The music you use should be as ambient as possible. This will prevent the PCs from being distracted and drawn away from in game conversations and storytelling. It is background music after all.
3)Loopable. You want to find music that remains as constant and consistent in theme as possible to allow you to play the music on a loop.
4)Find music from many artist. Most artist tend to have the same "feel" to their music. This isn't always the case, but by using music from a wide array of sources (through out your campaign) you prevent the possibilities of style overlap. However, overlap can be used to your advantage. Keeping the same style of play can keep a kind of "theme" going throughout a quest or dungeon.
There could be other things, but for the time being this is all I can think of :)
Lastly I would like to show you all some music that I have been using in my campaigns. Some I just discovered and others I have loved for quite a while. In all honesty, it was these musicians who inspired me to write this post.
The first is Brandon Fiechter's . Despite his youtube page being a bit hard to navigate from theme to theme, his music definitely seems to score well in all the above mentioned categories. It is low key and covers a wide range of themes; Forest, cave, desert, city and village music. His brother (?) Derek is equally talented.
No epic battle would quite feel the same without music from Two Steps From Hell. Although I must say that their music can sometimes be a little too epic. I try playing their music only during large fight scenes, like epic castle storming or large scale combat.
Joshua Buck Music also presents really smooth ambient music that I find can be used on numerous occasions. There aren't as many songs to choose from here, but the few are gems in my opinion.