How do you tap an acoustic guitar without hearing extra noises?
AFAIK, tapping is mostly an electric guitar technique, partly because electric guitars have lower action than acoustics, and partly because electric guitars are amplified. For both these reasons, you don’t have to tap as hard on an electric to create the sounds you want at the volume level you need to be heard. On an unamplififed acoustic, the higher action and lack of amplification mean you have to tap a lot harder, which is why you get those unwanted extra sounds. It CAN be done on an acoustic — I saw Michael Hedges in concert once, and he created some awesome sounds by tapping on an acoustic — but he was playing an acoustic fitted with piezo-electric pickups and running the signal through a variety of effects boxes.
