To the builders out there... There's something I've been wondering about for a long time. I have talked with a guitar builder some time ago and he told me that (a) the sound of a guitar changes when it is played (very?) often over a long period of time (think years) (b) if you stop playing a guitar for a long time, it will go back to sounding as it were new. This should go to the extent that one can actually hear this difference. (As opposed to only being able to recognize it with a computer analysis, for example.) I must admit that I thought that such stories were myths generated by people selling off their old gear, but the above short talk has kept me wondering ever since. As a player, I don't have the experience yet to confirm this change of sound / feel myself. So, I have a few questions to the builders among you. You may have some education (or you can make some educated guess about this). (1) Does the sound of a guitar change when it is played often, over a long period of time? (2) Does the feel / resonance of a guitar change when it is played often, over a long period of time? (3) If you don't play a guitar for a long time, does the sound / resonance go back to original (i.e., as it was new)? (Apart from the dents, of course ) (4) What are the scientific explanations of the above phenomena, if any? I am, of course, most interested in (4). Thanks a lot!