Sounds from my gastro-intestinal tract

Some weeks ago I was in the middle of practicing the banjo when I decided that there was something I wanted to discuss with my better half. I walked into the living room with my beloved Calico slung around me neck in the playing position, i.e. resting against my mid-abdomen. Whilst talking I suddenly noticed some deep growling noises emanating from the banjo pot. A few moments consideration brought me to the bizarre realization that the sounds were from my gastro-intestinal tract at work on a meal eaten just previously, and that these were being considerably amplified via the banjo. Has the banjo a role to play in diagnostic medicine I wonder? Mike