If you feel taps when your iPhone plays music, this is called haptic feedback or system haptics. You can turn this off by going to Settings > Sounds & Haptics and scroll down and turn off System Haptics.
Otherwise go to SETTINGS> GENERAL> ACCESSIBILITY. Scroll down and slide that little balance slider all the way to the left.
If you think that your iPhone vibrates excessively, contact Apple Support would be the best way.