Reddit reviews Smof Ground Loop Noise Isolator for Car Audio/Home Stereo System (Eliminate The Buzzing Noise Completely) with 3.5mm Audio Cable, Black

Just gonna leave a link here to the one I got to solve this problem a while back in case anyone needs it. $8.50 and no more noise.

https://www.amazon.com/gp/product/B0171PQLB8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Probably a ground loop issue. Check that you've got a good ground connection on both the audio lead and the power connections. If possible, have the amp and PC connected to the same power bar or double socket. If that doesn't help, isolate the systems by using digital audio out if your amp has that, or use an optical ADC powered off a separate supply, or use an audio isolation transformer https://www.amazon.com/Smof-Ground-Isolator-System-Stereo/dp/B0171PQLB8/ref=sr_1_1?ie=UTF8&qid=1483921456&sr=8-1&keywords=3.5mm+isolation+transformer

It can either be two things:

1- a ground loop issue, which should be fixed with a ground loop isolator, like this one

2- an internal interference to your sound card caused by electro static interference when plugin the HOTAS. If so, maybe you'll need an external DAC to avoid such interference. Does maters where you plug your HOTAS (any USB port, through a USB hub, etc)?

Edit: please, have in mind that ground loop isolator can have an impact in audio quality, although, if you are using skullcandy headphones, you would probably not notice it too much.

I don't know, IIRC you can pretty much just hook up a plug straight to your radio with no further electronics or anything because your older radio supports that, but you'll probably still want one of these

I added an aux port to my 2006 not too long ago. A ground loop isolator is a must otherwise you'll get a lot of background noise during acceleration and when you charge your device.

I got these parts:

Goliton aux cable for Mazda

3.5mm feed-thru panel mount jack

ground loop isolator

The combination works perfectly. I drilled a hole in the center between the cigarette lighter and the passenger airbag light. There is plenty of space behind it and the part is pretty cheap (less than $20) to buy used on ebay if I must return the car to stock configuration.

For my setup I use a male to male 3.5mm cable to plug my Switch into my PC's line in port. That way you get both the game audio and Discord audio through the same headset. Also had to use a ground loop isolator to get rid of some noise, but now it works beautifully.

These are the the ones I bought, but there are a million to choose from:

https://www.amazon.com/gp/product/B0171PQLB8/

https://www.amazon.com/gp/product/B00NO73Q84/

I got this

https://www.amazon.com/gp/product/B0171PQLB8/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

for my video game setup but people in the reviews say they use it for their car aux to eliminate white noise. They say it negatively affects bass tho.

I love my SyncUP DRIVE because it is able to add a whole dimension to our SUV.

I don't know what it is about FM radio in cars, but the last couple vehicles, the signal and audio quality has been absolutely atrocious. Unless you have that HD Radio feature built-in on your car's entertainment system, it's so staticky and low quality that it's not even worth listening to.

So, I grabbed a second-gen Amazon Echo Dot on sale for $30 and plugged it in my car, with a 1A micro-USB charger and an audio cable (plus a ground loop noise isolator to remove the humming/hissing noise), and now my wife and I are able to stream our favorite FM radio stations via iHeartRadio and TuneIn, not to mention Amazon Music, Pandora, and Spotify. Granted, Amazon streams their audio through an encrypted network connection (akin to a VPN connection), so T-Mobile is not able to downsample it and therefore is not Music Freedom-eligible, so that streaming counts against my monthly data allotment.

We've got the grandfathered Mobile Internet 6GB plan with Binge On and Music Freedom for $40, with a $10 discount for having phone lines, and $5 discount for AutoPay, ultimately bringing it to $25 per month. Surprisingly, there's also another 6GB plan for $25, but T-Force says the discounts are already applied to that, and the plan is tweaked, but not for the better: throttling on these new plans specifically state that they're forced down to 2G speeds, whereas my grandfathered plan says it's just "slowed down." I've never broken the 6GB barrier in a single month, as I use up 4-5GB per month with encrypted music streaming, so I don't know what the speeds are after that. I also have 4G LTE tethering, but I hardly use that as well.

In addition, I also grabbed an Amazon Fire TV Stick for $30 and plugged it into the Rear Entertainment System's HDMI port (and USB port for power), so the kids can watch Netflix, Hulu, Amazon Video, and even the SlingPlayer app back to my Slingbox connected to my TiVo at home, so they can watch their recorded shows and live TV. All those streams are zero-rated for Binge On, so they can watch all they want to their hearts' content. No more swapping DVDs and Blu-rays, it's all on demand.

All that, plus vehicle monitoring/tracking/logging, diagnostics, and included Roadside Assistance, this is probably the coolest thing to have on my T-Mobile account.

I have the ground loop isolator connected between my switch and microphone jack on my laptop

https://www.amazon.com/gp/product/B0171PQLB8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Could be hardware issues in your setup. Higher end motherboards usually account for this, but some lower end models have the audio power on the same loop as the rest of the motherboard (from the 20/24 pin). If you don't have a high rated PSU, you could be getting "dirty power" which is known for giving whining sounds or buzzing sounds. A very simple fix is to feed a ground loop isolator, they're like 5 dollars or so I'll link you one, they basically just are low end filters for that unstable power coming out of a headphone jack.

https://www.amazon.com/dp/B0171PQLB8/ref=cm_sw_r_cp_api_7SFFzb5QMXFK3

Basically plug the included cable into your motherboard audio out port and one end of the isolator. Plug the Sennheisers into the ground loop isolators other port and it's like having a lil filter. Hoping this cheap solution helps, it helped my brothers problem when I build his PC from my old parts.

I used a ground loop isolator*when I had issues with my headset and microphone and it fixed them.