danielddd1
i know you can tune some instruments to special frequencies of sound called the Solfeggio frequencies that have healing abilities both physical and emotional, apparently the pope outlawed these frequency's in the dark ages because they were "evil". they have been rediscovered recently. i tuned my guitar to one of the frequencies (417 hertz, the only one my tuner would go too) and i have to say it sounds better and you can feel the music more so than the normal 440 hertz, if that makes any sense..i know you can retune stringed instruments to it,but not sure about other types.apparently you can buy tuning forks with the frequency or learn to hum it.
here are some links i found quickly with some info about all of this-
http://www.rangeguide.net/freewaves.htm
http://www.healthyworldmedia.com/blog.php?hbid=2
this topic really interests me but i dont have much time to research it, hope someone takes an interest in this and reports back on the forum about it.