From my understanding pickups detect string vibrations (from strings that are obviously metal). I have read many times that different bodies\necks have different overtones that make them sound the way they do. I understand that sound travels through wood (based on my experiments) but when it comes to amplifying these "overtones" can anyone either explain, link or give me an idea how the pickups amplify the overtones. IT is my understanding that pickups detect strings (metal strings). I don't see how they detect overtones or vibrations in wood.