A Funny Rattling Noise

The little country parish wanted a fill-in organist, so I agreed to help out a bit.  But when I turned on the organ, it made a terrible rattling sound. We checked for loose boards or keys--nothing. The pastor admitted he had recently moved the organ and we were suspicious that might have damaged it some way.  But the FUNNY thing was when the men took off the back, they found inside two kernels of corn and 10 soybeans. They had fallen into the left speaker and were making the funny rattling noise.  Hmm?! Better than a dead mouse or $800 repair for parts.