Severe short term audio distortion when watching Netflix

It's the fact that the duration of the distortion is always 3-4 seconds only  - not longer , not shorter and only once per night - just at different times during the 3 hour timeframe

If it was interference from outside - why always the same length?, and why only once?

The 3 second of distortion on it's own is no big deal from my perspective - just don't want it to be slowly frying my speakers - even though I recognize it straight away and immediately turn the volume down - it may happen when I'm out of the room

Thanks - I don't have a TV - only PC monitor - and know nothing about streaming

I'll ask my mate who built this PC for me to investigate the Process monitor angle

Thanks for your quick reponses

No Smart Meter and no wireless security system

Regarding Power Station issue - wouldn't a interruption or surge cause more issues than just Audio for 3 seconds? - Picture ( video) is not affected

It's a different time each night - last night 7:08 PM, night before 9:55PM - but always between 7-10PM 

I'll check the Power and antivirus leads and get back here if I have any further updates

Thanks again for your help

Michael

Yes I live in a 5 unit group - 3 units in my block and a separate block of 2 units

Entirely possible that my neighbours are coming in and out and switching on AC, devices etc- But this has only started happening 12 nights ago - nothing has changed in my system and neighbours are the same - and I've been home for the last 2 months  and haven't seen any work installing new AC etc 

I've been shown how to access real time process monitoring from the task bar - I'll bring up that window at 7pm tonight and see if anything spikes during distortion.

What sort of interference do you mean  - I live in a ground floor apartment in a group of 5 - as far as I'm aware - my neighbours all use laptops - don't know if that info is of any use

Thanks Gregdude - But again, the computer is running and I'm watching something online - either you tube or Netflix most of the day and night ( I'm retired and lazy !)

Why did it only start 12 nights ago and how do I identify and isolate that burst of Data?

It just happened again at 8:10PM

I had  task manager window opened on processes and nothing spiked, not even 1%

I'm ready to pull my hair out 

What the hell can it be????

I plan to call my power co. tomorrow to see if they can provide any info re: switching feeds etc - I live in a suburban area , just a few shops and petrol stations , no industry

Can’t be sunspots because it’s winter here in Australia... 😀

Thanks to all for the flood of suggestions - I’m sure there is a solution somewhere

Power co. - no joy - they just said everything looks fine from their end and couldn't give me any info on switching power feeds or transformers etc..

Have an ethernet cable from Internet wall box direct to PC , no modem, no wifi

The Netflix thing is a possibility , but the first night it happened, I was watching a movie on Youtube

Can you describe your Netflix issue more?

New spanner in the works - a few days ago, same 3 second burst happened twice in an hour while listening to wav. files stored on my PC... 🤣

Michael

Just to finish this post for any future reference - It appears to be my Matrix Element H USB card that is the culprit

After 14 or more days of the Distortion happening at least once per day - plugged USB cable into a rear M/B port and nothing for 10 days

Replugged into Matrix Card and although it took four days to occur -distortion again

Back into M/B port and all good again for 10 days so far

Thanks for everyone input