Right, you had a question. Assuming your idea was once a trade secret, that protection is over now that you've provided it to others without requiring their confidence. It doesn't seem like your idea would be protected by copyright since you're apparently referring to a method of doing something (and copyright doesn't protect methods). Maybe your idea could be protected by a patent because many great musical ideas have been protected that way (at least that's what we said in one of our books). In that case you have one year from any written disclosure of your idea to file for the patent (or to file a provisional patent application and file a regular patent application within one year of that).