The best way I can answer your question is to give you a link to a 2002 neuroscience symposium that discusses this subject in detail. It is only one of many such links to the credible research that has been done and continues to be done around the world regarding music and language development.
http://www.bethabe.org/2002_Symposium_Summa154.html
Here is just one abbreviated quote from that link pertaining to work done by Dr. Aniruddh Patel (Neuroscience Institute - La Jolla, California)
"Dr. Patel presents recent studies that challenge the traditional view of language and music as being independent brain functions, and suggest that the two can involve similar brain areas and functions. Through a series of systematically conducted investigations, using EEG and brain imaging techniques, he attempts to establish neurocognitive basis of commonality between the syntactic processing of music and that of language. ..the MRI study revealed that the electrical responses shared for language and music were localized to the Broca’s area...similarly, the fMRI study showed that the entire brain network activated by music largely shared with one that is responsible for language processing. These findings strongly suggest that musical syntax is processed in the brain areas and through their networks that are known to be involved in processing linguistic syntax."
In regards to reading and related language skills, other similar studies show that a child will learn to speak according to the sounds he or she hears. Infant directed speech, or "parentese" has been found to closely resemble singing patterns and infant responses to this type of "singing-speech" indicate that ear training is an integral part of all language development skills. This has to do with how neural connections (ganglia) form and grow (even in the womb in response to music and the mother's voice).
But that's enough data for now.
The wonderful thing is that this information does not have to be inaccessible to non-musicians or non-singers or homeschoolers.
Thanks for your willingness to consider new ideas for new boards.
Joy