Originally Posted By: VideoTrack
If it's caused by 50Hz mains, then the interference would be delivered as a continuous low-frequency hum.

It also may be that something has become dislodged as part of your relocation effort and is delivering the static. Perhaps an edge connector or other internal connector?

To rule out your home environment, can you take the gear to another location and connect it up to test?

It partially depends on how "clean" the 50hz is for him. In some places I've seen AC as a nearly pure sine wave, and in others it's got all sorts of spikes and other nasties. Some of that noise can present itself way up into the khz range or even mhz range, which can cause all sorts of weirdness when that's being sampled at the regular audio sample rates.

One thing I've done in the past that can help with situations like this is to use balanced cables with the ground lifted at the receiving end. This can often produce lower noise than having the ground connected at both ends. If you're handy with hand tools and/or a soldering iron it's fairly trivial to lift the ground at the end of a cable, provided it's a jack that can be disassembled.

I agree that some internal connector somewhere could've shifted, which could cause this problem.

Rayc, did you try the blackout test?

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