Each of the crystal bowls I work with correspond to the chakras and notes of the octave. Thus it is useful to have an understanding of the chakras which are really energy maps of the body.
The Chakras are vortices of energy and is the Sanskrit word for "spinning wheel of light" . These are energy centres of the lightbody which correspond to the physical endocrine system. Please see the chart below to reference musical tone to the energy centre.
By speaking/chanting the Sanskrit name for the chakra you can help activate your own healing. These are the points that aid the transformational process.
This beautiful painting, Theologue (detail) is reproduced with kind permission by Alex Grey http://www.alexgrey.com/ It beautifully shows all the Chakras.