I need a copy of the Sound of संगीत musical libretto (stage version) on line. I have the book from the company, but I need a larger version for the stage manager and director, and it doesn't copy well.

आप can get it here:
link
And when आप purchased the rights आप should have been दिया a rental सूची which includes the full vocal scores and libretto for the cast.

Since I know you've purchased the rights...
here is the link to the rental eqipment from R&H.
link.