Alright I have bought a book, and I am teaching myself how to read music.(My teacher cheesed on me twice so I figured I would take the $30 a week and buy books and videos and post my questions here) Given: If a note is altered by a sharp or a flat, it remains that note for the rest of the measure unless canceled by a natural sign. Correct? Question: Does it go back to the natural note on the next measure/bar if there is no natural sign, or does it remain the sharp or flat note? I hope I am making sense. Thanks for your help.