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Audio crackles with multi GPU setup

Hey Unreal community!

I may have run into a bug in the current engine which has to do with multi GPU setups when you open windows on the secondary screen. Here's my current setup:

I have 2 GPUs installed, a Nvidia 760 GTX and a 610 GT. The 760 has 2 monitors attached, a full hd Samsung (1) and an older LG (2). The 610 has 1 monitor attached which is a full hd (3) too.

The main UE4 editor window runs on (1), I have another one on (2) which shows me the world outliner. properties etc. There's a content browser window open on (3) which allows me to work more efficiently while having the game in nearly full screen on (1).

In one of the projects I am working on I've recently set up a sound cue which fires when the character makes a footstep. When this happens or when I play the sound in the editor, it is crackling a lot. However, if I close or minimize all the windows on (3) so UE4 Editor is only running on the 760, the crackling is gone.

Is this a known issue?

Below are some screenshots of my system specs. Please tell me which additional information you need to be able to reproduce the issue and I'll do what I can to provide more details.

Display setup screenshot Nvidia driver props Generic system info

Product Version: UE 4.21
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asked Feb 10 '19 at 02:54 AM in Bug Reports

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Khazuyo
11 1 2

avatar image Jeff A ♦♦ STAFF Feb 11 '19 at 09:05 PM

Hello,

We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks

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