Although this question is a “no-brainer” for many Christian musicians, many others struggle with it, especially folks who came up through legalistic systems that label anything that isn’t distinctly ”Christian” as “of the devil.” I don’t have a “one-size-fits-all” answer to that question, but I have some observations and experiences that might be helpful.
http://schooloftherock.com/html/can_christians_sing_secular_mu.html