Final answer:
The usual method of payment for a music publisher is a split of income from royalties, rather than a fixed fee or an advance.
Step-by-step explanation:
When an initial copyright owner engages the services of a music publisher, the most common method of payment is through a split of income that is generated and collected from the sale and use of the copyrighted work.
This means that the publisher will receive a percentage of the royalties earned from the work rather than a fixed fee or an advance. While it is true that some authors may receive large advances for their works, in the music industry, it is more common for publishers to earn their income through a share of the royalties generated by the copyrighted material.