Sound distortion when using a mixer on PC

[Luddy †]

I recently build my brother in-law's first gaming PC. He's a musician too, so he has a mixer (Yamaha AG06) that his mic and headphones are connected to.

The issue is that when he has his speakers (headphones or normal speakers) connected to the PC, the sounds get really staticy every 30sec. This problem doesnt happen if he connects his headphones the if he connects them directly to the PC via AUX.

 

I've attached a vid of it happening that he sent over to me.

So far we've tried:
Windows Update
Every update there is to be downloaded from the motherboards website. (Asrock) (https://www.asrock.com/mb/intel/h81 pro btc/)
Thought about updating the BIOS, but not sure yet.

System specs:
i5-4400
RX 570 4GB
Mobo: Asrock H81 Pro BTC
8GB RAM
400W PSU

All help is appreciated!
 

[Hairless Monkey Boy]

Is it feedback?

[The Torrent]

Is ur mic playing through ur speakers?

[TheGav]

Is the mixer new? Is there a lot of heat nearby or being generated from a component?

[Luddy †]

34 minutes ago, HairlessMonkeyBoy said:

Is it feedback?

 

23 minutes ago, The Torrent said:

Is ur mic playing through ur speakers?

 

21 minutes ago, TheGav said:

Is the mixer new? Is there a lot of heat nearby or being generated from a component?

Not feedback. Just random distortion

Mic is playing fine with no distortion. We've tested with my mixer (AG03) and the same thing happens to it as well. Doesnt seem to be a mixer issue.

Mixer is brand new. 2 weeks old or something. You can see it (white box) in the video. PC's on the floor, so its standing alone between his 2 monitors.

[Hairless Monkey Boy]

4 minutes ago, Luddy † said:

Not feedback. Just random distortion

And you know this, because you tried playing music without the mic plugged in, right?

[The Torrent]

5 minutes ago, Luddy † said:

 

 

Not feedback. Just random distortion

Mic is playing fine with no distortion. We've tested with my mixer (AG03) and the same thing happens to it as well. Doesnt seem to be a mixer issue.

Mixer is brand new. 2 weeks old or something. You can see it (white box) in the video. PC's on the floor, so its standing alone between his 2 monitors.

and you also tried troubleshooting by testing the entire thing without the mixer, different speakers,etc. right?

[Luddy †]

3 hours ago, HairlessMonkeyBoy said:

And you know this, because you tried playing music without the mic plugged in, right?

 

3 hours ago, The Torrent said:

and you also tried troubleshooting by testing the entire thing without the mixer, different speakers,etc. right?

- Yea, same thing with or without it plugged in

- Yes. The sound doesnt show up when the headphones are directly connected to the PC. Only through the mixer. Same with my mixer, and I use my mixer daily.

Note: We've now tried with mixer software update as well. No change.

[Hairless Monkey Boy]

Might be something with the way Windows handles sound. Something about directsound vs wasapi vs ASIO.