Earning a livelihood is one of the duties of a householder. If you must earn a livelihood from making music, then by all means it is acceptable to do this. But it should not be justified by calling it your service. Earning a livelihood is a support to your service. Your service is hearing, chanting, and propagating the pure holy name (the holy name distributed without any desire for remuneration). If you have no time to propagate the pure holy name, then use the fruits of your livelihood to support those who are propagating the pure holy name.
(Collected Letters to My Disciples, Vol 3, Pg 43, 5th Paragraph)