Music and sound can create balance as well as inbalance and
through the contact with these frequencies stabilize physical, 
emotional, mental and spiritual conditions.
Music therapy means to help with - not to supplant 
- present medical treatment.

When listening to music, being vibrational sound, we can revive proper 
flow of energy and create balance. Some of the most effective 
vibrational remedies are in addition to sound :

colour 
aromas 
flower and gem essenses 
crystals and stones 
and thoughts. 
 

More relevant information can be obtained from the following links :

The Academy of Sound, Color and Movement 
http://www.tama-do.com

Music Therapy
http://www.musictherapy.cc

Music for Transformation
http://www.soundfeelings.com/products/alternative_medicine/music_therapy/index.htm

Music Therapy Online
http://www.musictherapyonline.com

Atlantis College of Crystal, Reiki & Sound Healing
http://www.atlantiscrystalhealing.com/music-sound-healing.htm

American Music Therapy Association
http://www.musictherapy.org