# 4.13 UseAudioThread=true causes subtitles to not always display **URL:** \ **Category:** Audio\ **Tags:** subtitles, UE4-13, unreal-engine, Blueprint, question\ **Created:** [September 4, 2016, 3:43am UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292 "2016-09-04T03:43:43Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Guitar\_Bro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guitar\_Bro](https://forums.unrealengine.com/u/Guitar_Bro)\ **Post date:** [September 4, 2016, 3:43am UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/1 "2016-09-04T03:43:43Z")
I noticed that when building a project with the experimental parameter UseAudioThread=true (in BaseEngine.ini), subtitles that should be displayed from a Dialogue Wave don’t always appear along with their audio (which seems to play fine). What’s more, sometimes the subtitles appear midway through the audio clip, though they still end at the correct time. I noticed it happening when using Spawn Dialogue at Location in BP, though it may also happen elsewhere. _Relevant system info:_ Windows 10 64 bit UE4.13 AMD FX-8150 GTX 660Ti EVGA Superclocked 16GB DDR3 RAM If that’s not enough information, I can try to provide more. **UPDATE:** It appears that this behavior occurs regardless of UseAudioThread’s value and rather this is a bug in 4.13 in general. ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [September 6, 2016, 6:37pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/2 "2016-09-06T18:37:38Z")
Hey Guitar\_Bro, It seems you and another user could be experiencing a similar issue. Just for clarity and consistency here is the other post I am mentioning. > **[\[BUG\] Overlapping Dialog Waves - problem with subtitles](https://forums.unrealengine.com/questions/482004/bug-overlapping-dialog-waves-problem-with-subtitle.html)** > > There is a problem when dialog waves with sound wave of the same priority overlaps. Then subtitles are not rendered at all, or disappear just after showing or not showing at all. (There was no problem with that in version 4.12) To reproduce it,... Much like in his post, could you provide me with some steps to reproduce this issue on my end? Having a way to reproduce this issue on my end would be beneficial to entering a clear and full bug report. Let me know if you have further questions or need additional assistance. Cheers, ---
**Author:** ![Guitar\_Bro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guitar\_Bro](https://forums.unrealengine.com/u/Guitar_Bro)\ **Post date:** [September 6, 2016, 11:56pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/3 "2016-09-06T23:56:50Z")
Ah ha! That appears to be the same problem. Apparently a few of my dialogue clips overlapped slightly, so that would make sense. I managed to reproduce it in a new project but I can’t seem to attach it (even though it’s under 5.2mb). I took a screenshot of the script though: > **[ImgFuel – Your 100% Free picture Editor and image Converter](https://imgfuel.com/)** > > Free Picture Editing and Image conversion webservice for all your needs. This is 100% free to use as a photo editor and picture converter. In this case, “s1” is just a dialogue wave that’s longer than 3 seconds, so the next one is triggered before completion, causing the unpredictable behavior. ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [September 7, 2016, 7:48pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/4 "2016-09-07T19:48:12Z")
So I have been trying to get this issue to reproduce on my end, but I am having trouble replicating the set up. In order to share your test project with me, you can upload the zip file to a shareable google drive link and provide me with that link in your response. I am at the point now where I can see the subtitle text for the first Dialog Wave being played, but the second one does not appear. This is the case no matter the priority of the Media Sound Waves, and with or without a delay. Is this the issue you are reporting? Let me know if you have further questions or need additional assistance. Cheers, ---
**Author:** ![Guitar\_Bro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guitar\_Bro](https://forums.unrealengine.com/u/Guitar_Bro)\ **Post date:** [September 7, 2016, 11:03pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/5 "2016-09-07T23:03:20Z")
I don’t think that’s exactly my issue as it appears to sometimes briefly show the second subtitle before it goes away too early and sometimes it just appears to late, but shows up a second or two into the clip. Additionally, I’ve had a few instances where the first clip never showed any subtitles either. It may be worth a mention that when running my example project, I had to do it quite a few times before I noticed it happen again. Here’s a drive link to my example: [subtitle\_bug](https://drive.google.com/open?id=0B6GfhC_4qQ8ZeXNuRUVkaTRjSDg) ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [September 8, 2016, 2:26pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/6 "2016-09-08T14:26:35Z")
Thanks for the project as I was able to reproduce the issue on my end. I have gone ahead and entered a bug report for this issue which you can track by following the link below. **[UE-35716](https://issues.unrealengine.com/issue/UE-35716)** I will say that I tested this project in our Main branch (4.14) and the issue did not appear there. So, it seems this has been resolved along the way and a fix does not need to be made for this particular issue. With that said, I entered the bug for tracking purposes and so you can verify the issue is fixed when 4.14 is released. Thank you, ---
**Author:** ![Guitar\_Bro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Guitar\_Bro](https://forums.unrealengine.com/u/Guitar_Bro)\ **Post date:** [September 8, 2016, 2:40pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/7 "2016-09-08T14:40:47Z")
Great, thanks! ---
**Author:** ![anonymous\_user\_a7d9c852](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_a7d9c852](https://forums.unrealengine.com/u/anonymous_user_a7d9c852)\ **Post date:** [May 5, 2017, 1:05pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/8 "2017-05-05T13:05:42Z")
Still not fixed in 4.15. We are experiencing the exact same problem all the time. ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [May 12, 2017, 2:30pm UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/9 "2017-05-12T14:30:10Z")
This is marked as ‘Won’t Fix’ because this is due to sound priorities – you need to make sure the audio/dialogue is using the proper priority so that the dialogue they want to play is correct. Thank you, H. ---
**Author:** ![anonymous\_user\_6905364c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6905364c](https://forums.unrealengine.com/u/anonymous_user_6905364c)\ **Post date:** [July 13, 2017, 11:59am UTC](https://forums.unrealengine.com/t/4-13-useaudiothread-true-causes-subtitles-to-not-always-display/369292/10 "2017-07-13T11:59:27Z")
Could you please explain what “proper priority” is? We have them ramping up over the course of our dialogues and still have the issue. We also have the issue where even the first audios subtitle wont display. 4.14