My Studio is suffering from elctronic noise with every device that reproduce sound (Monitors. guitar amps).
After deep investigation it is clearly comes from the computer - probably the power supply.

i tried to filter the noise with a Furman power conditioner with no success and now im trying to think what options do i have.

1. i can try to spend more and try another power conditior
2. i can buy a new power supply BUT how can i know that the new one will be quiet?

any ideas?

Well, here is a way to make sure it's caused by your computer power:
https://www.amazon.com/Jackery-Porta...4170018&sr=8-5

Now this is an expensive solution. Another idea would be to take your computer and one of your monitors and audio interface and try it in someone else's house. Though this might not give you the answer you are looking for if their power is also not clean.

You can also get a generator that has a pure sine wave inverter, or a pure sine wave invertor that you can plug to a few car batteries. These are all expensive solutions. I guess you could buy one of those Lithium power supplies and return it if the place you buy it has a return policy. But I love those things and they are great to have in case there is a power outage. So maybe you may want to keep it.

Also, if it works, you can keep your computer plugged in to the power bank and have the power bank plugged into a wall. If you have a power failure, you can still use your computer and save your projects.

Just a thought.

Intermittent or random crackling is usually caused by a software setup or configuration issue. It could be that something is wrong with your iOS, DAW, or device drivers. But regular or systematic crackling is often caused by a damaged interface or an improperly installed driver.

iMessage for PC

Yeah, this is not uncommon and yet a bit problematic to sort out.

Unfortunately, any time you go looking for info or specs on PSU noise, it's all about fan noise. There's not a lot of focus on electrical noise or EMI emissions - no ratings, rarely any specs. And if you go searching anything about PSU noise you will get a zillion results on fan (acoustic) noise ... sigh.

Let's look at one simple win I had with an older PC. It radiated audio band electromagnetic interference. It sucked. Looking at it I realised that the metal case should be containing a lot of it - why wasn't it? It occurred to me that all the metal parts were coated in black paint, including along the joints and even into threaded parts where the PSU mounted. Multimeter testing revealed that, sure enough, this stuff was an insulator and the PSU case wasn't really connecting the case at large to ground, nor were the doors and other panels electrically connected to the case frame. So, I filed off the paint at selected points of contact and tinned them with solder. Everything electrically connected and grounded itself properly and the noise emissions reduced about 90%! So look at that.

I eventually replaced that PSU. As I say, getting good information is hard. I decided to go relatively up-market replacing a <$100 supply with more like a $250 supply at the time. Just to get a better design and higher quality component choices. In doing so, I noticed some of the supplies boasted a bit about their premium name-brand capacitors. That was as close as I could come to some kind of focus on electrical noise reduction so I bought one of these supplies and it was so much better - completely removed all the remaining noise. Below is an example of this sort of 'capacitor pride' on a modern Corsair SF600 SFX PSU.

There's no real guarantee there I know ... and it's plausible you may have to buy (and possibly return?) several PSUs to solve this, but it's the best I can suggest.

A regular Furman wont help.
Try a transformer based isolator like those sold by Tripplite, or APC battery based UPS with filtering.
Plug as many things as you can into the same outlet/ breaker circuit to avoid, well, lots of issues. Make sure you are safely under 15amps which is probably easy unless you have a massive guitar amp + hair dryer plugged in.
Get a new power supply for your computer and make sure it's grounded peoperly as the above post states.