Hi I am also having problems with the sound. It sounds like static. At one time I mentioned seeing baby babbons playing with the box and cables on the tree. I do not know if they are strong enough to do any damage, but they were having fun.
Ants will chew through wires on trees. When a friend and I were staying in a cabin in south texas the Fire Ants chewed the electric wires for our electricity and had to be fixed and cleaned out.
Also, why is the quality of the videw so fuzzy in the morning? It takes hours before it gets clearer. Makes it difficult to see things clearly.