If a rat dies near a steam pipe, the body wonât dry and the smell can be horrible for weeks. The odor from a dead mouse may last only a day or two. In fact, there may be no noticeable odor from a single dead mouse but several dead mice in the same area could smell for a few days.
Most popping or crackling sounds in an audio system come from a bad or dirty connections. Sometimes they do come from a faulty unit or component, but in most cases it is a connection issue.
If the noise comes from your amp or it is making intermittent crackling type noises (specially in tube amplification), noises that can come and go or be triggered by certain notes/frequencies or peaks. On an preamp/amp intermittent crackling can be caused by a few different things. The most obvious in the case of a tube amplifier are the tubes. Another thing to look at are the plate resistors. These are the resistors that connect the DC supply to the plates of the tubes.