Recommendation: Complete revelation of the music system for the Tanakh. If you're a musician then you can dig in and use the system. Applies to te'amim notation in the full nikud marked text. Peripherally applies to a possible musical codes system at ELS, however, if there is a musical codes at ELS, then perhaps it uses the same system as used in the surface text of the Torah and Tanakh. May be good background material, but is heavy musical theory oriented and not light reading.
THE reference book for full musical scoring of the Torah and Tanakh. The book was translated from French to English by Dennis B. Weber and published in 1991. The late Suzanne Haik-Vantoura spent her life discovering how to fully utilize the full musical notation for the Torah and Tanakh, such that one could now score the Biblical text with a full orchestra as might have been used at the time of Solomon's Temple.
In Music Spirit and the Keys to Prophecy, Roger S. James utilizes the discoveries in The Music of the Bible Revealed to musically score chapters of the Bible. And they sound wonderful with a full musical accompaniment. For that reason, those of you who are musically oriented might find The Music of the Bible Revealed to be a great background source of information.
My interest is in exploring background material on musical systems which may apply to a music code at ELS (equidistant letter spacing) in the Torah and Tanakh. Since Suzanne Haik-Vantoura's book fully explains the surface text musical notations, it may apply to a codes at ELS too. If you get the book, don't expect anything on music codes, but you'd get an indepth book on the music system for the Torah and Tanakh as spoken/sung in Hebrew. If you're looking for light reading and aren't musically inclined, then this book is not for you.
The Music of the Bible Revealed is available at Amazon.com and Barnes&Noble.com.