Search OneSearch for books or ebooks on your general topic. Books are great sources to get you started. You will often find an overview of your topic, and maybe one chapter on a more specific aspect of your topic that you can focus on. And you have a source that you can actually cite! (unlike Wikipedia :)
After you enter your search terms, use the filters on the left to refine your search to Books/Ebooks.
Search OneSearch for articles, books & more
Do some pre-research to help you explore a topic. Skim some general sources (books, encylcopedias, websites) to understand the many issues related to the general topic. Looks for the "who, what, where, and when" of music business.
Make a list of possible topics:
Choose the topic you're most interested in, music business in the digital age, and do some more pre-research to help you further narrow the topic:
Researchable question: Is the digital age causing the creation and distribution of music to be so simple that the value is diminishing?