My sister in law recently bought a wee flat but she is having some issues with loud crackling intermittently coming through the speakers.
Ive ruled out the gas boiler/TV/AMP/ SPEAKERS/DAC.
The main issue is when she tries to play a movie on her 4k blu ray or listen to music with an attached hard drive-crackling happens every couple of minutes.
Ive put rfi chockes on all the power supplies, tried changing sockets for the mains block.
Even plumbed in my balanced mains-still there.
swapped in my same model blu ray/psu/hdmi....still there!
Any thoughts....thought maybe fridge/leccy meter/somebody in the block with a defective something feeding muck into the mains.
System works fine with the TV doing music or streaming-im stumped!
Help please!