The violin, close to the human voice, is read as delicate feeling and longing. Dream books link a sweet tone to tenderness and a screeching one to nerves pulled too tight.
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.