A music shop is read as the search for a way to express what words cannot. Dream tradition takes it as a creative longing, and as finding the instrument or tune that fits your mood.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.