The following is an article on http://www.leadingshield.com regarding research done into the chakra’s and its relation to music.

“After many hours of research into the topic, a collective, common denominator interpretation. This graphical interpretation of not only the musical notes associated with each Chakra, but also the colour for each Chakra, has been done with the intent to hopefully give people an understanding of why we feel different, more relaxed and less stressed when we listen to certain styles of music. 

Our Chakras, or energy points resonate to sound, and when music/sound in different pitches is played, our bodies absorb the musical energies which in turn can  start bringing about a balance within ourselves, a stabilisation of our energy system, which in turn makes us respond to the frequency and helps to calm our body down, bring it into a more relaxed and less stressful state.

• So next time you listen to a piece of music, try and feel the music and let it work its wonders on your body.
• Try playing an instrument in a key associated with a Chakra within the region you feel might need some help, and see what happens.

•  I certainly know that when I play one of my Flutes in a particular key, and more-so now when it is a key associated with a Chakra point, I feel something and I certainly know I feel a whole lot better after playing my Flute.

When the Native American Indians first came about their Flutes, and going by the keys of a vast majority of Native American Flutes that are in Museums and private collections, they had a different idea of what a "Music Note" was, as we know them today,  and the association of a music note to the Chakra Point.

Then why is it, that the vast majority of  Traditional Flutes, where in the keys of F, F#/G, which as we can see in the diagram above, are related to the Heart and Throat area of our bodies. Prehaps  they come about these keys because they knew already about the correlations to the body.”

Excerpt from

http://www.leadingshield.com