# Profiler becomes unresponsive **URL:** \ **Category:** FMOD Studio\ **Created:** [September 1, 2025, 6:50am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298 "2025-09-01T06:50:50Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![jvd](https://avatars.discourse-cdn.com/v4/letter/j/7feea3/32.png) [@jvd](https://qa.fmod.com/u/jvd)\ **Post date:** [September 1, 2025, 6:50am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/1 "2025-09-01T06:50:50Z")
In our game, running in windows 11, custom game engine, FMOD Studio 2.03.08, if I record a large multiplayer battle into the profiler and click through the timeline, the profiler itself slowly becomes less and less responsive. It will get to the point where nothing triggers audio in simulation mode. I have uploaded the profiler recording as a package to my profile on this site. Is this behaviour expected due to the large number of events, or is this a bug in Fmod Studio? Cheers, Jeff ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [September 4, 2025, 4:15am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/2 "2025-09-04T04:15:38Z")
Hi Jeff, Thank you for sharing the profile recording and the detailed information. I wasn’t able to reproduce the issue on my end using the recording you provided. However, we did address some UI stalls with large profiler sessions in our latest release. Could you please try testing with FMOD Studio 2.03.09 and let us know if the issue still occurs? ---
**Author:** ![amegliofrancesco](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@amegliofrancesco](https://qa.fmod.com/u/amegliofrancesco)\ **Post date:** [September 17, 2025, 1:44pm UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/3 "2025-09-17T13:44:59Z")
Hey, we’re experiencing the same problem here. The profiler becomes very slow and almost unresponsive after few minutes of profiling. We’re on FMOD 2.03.07 , at the moment we can’t upgrade. ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [September 23, 2025, 1:39am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/4 "2025-09-23T01:39:48Z")
Hi, Thank you for sharing the information! > [@amegliofrancesco](#): > > We’re on FMOD 2.03.07 , at the moment we can’t upgrade. Would you mind sharing a bit more detail on why upgrading to the latest version isn’t possible at the moment? We generally recommend moving to 2.03.09, as 2.03.07 is less stable and many issues have been resolved in the newer releases. ---
**Author:** ![amegliofrancesco](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@amegliofrancesco](https://qa.fmod.com/u/amegliofrancesco)\ **Post date:** [October 9, 2025, 11:57am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/5 "2025-10-09T11:57:11Z")
Still experiencing the same slowness in 2.03.09. It’s became almost impossible to mix and profile more than 5 minutes. ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [October 13, 2025, 5:17am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/6 "2025-10-13T05:17:20Z")
Unfortunately, I was still not able to reproduce this issue on my end. > [@amegliofrancesco](#): > > It’s became almost impossible to mix and profile more than 5 minutes. Could you please send us the Studio logs from the affected run so we can dig deeper? On Windows, FMOD Studio’s log files can be found in `%HOMEPATH%\AppData\Local\FMOD Studio\Logs` . ---
**Author:** ![\_MaX](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/_max/32/101_2.png) [@\_MaX](https://qa.fmod.com/u/_MaX)\ **Post date:** [October 13, 2025, 8:54am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/7 "2025-10-13T08:54:08Z")
@amegliofrancesco ( cc @li_fmod ), I’m experiencing the same thing. Nothing is wrong on the project itself, so I assumed the amount of data for a profiler session was too much to handle over time and I’m containing my profiling sessions to a 2/3min span, or eventually activating the profiler the moment I’m noticing an issue or want to track something weird. It’s the exact same way as you describe : Profiling session starts great Then after a couple of minutes it starts to lag a bit Then if you keep going, FMOD itself is starting to drop some events, and the longer the profiling session, the more often it happens, to a point where you pretty much don’t have the same behavior as the “normal version”. Notes : - this happens in both PIE (for UE) and Cooked/Standalone game situations. - tested with or without Cubase/UE5/SoundForce/SpectraLayers (and my tools for my everyday job) active in the background, same thing… it just happens sooner or later. ---
**Author:** ![\_MaX](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/_max/32/101_2.png) [@\_MaX](https://qa.fmod.com/u/_MaX)\ **Post date:** [October 13, 2025, 8:55am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/8 "2025-10-13T08:55:20Z")
Ho also : the frametime is massively influenced by the profiler. So never profile FMOD if you want to monitor the frametime at the same time. ---
**Author:** ![andrybo](https://avatars.discourse-cdn.com/v4/letter/a/c37758/32.png) [@andrybo](https://qa.fmod.com/u/andrybo)\ **Post date:** [October 13, 2025, 2:35pm UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/9 "2025-10-13T14:35:15Z")
Same issue here, profile became unusable after 2/3 minutes (if lucky).Using 2.03.09 and this didn’t happened in the previous version we were using (2.02.19). Also Live Update problem: - the first time you run the game goes to “syncing” and then on “sync on” - from the second time it get stuck to blinking “Syncing” (seems to work aswell but…) - muting or soloing events the first time take like 10-15 seconds. Really love your product guys but this is becoming a real problem, quite unable to profile. We’re about to mix a big game and we don’t know how we’ll do really. ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [October 14, 2025, 5:30am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/10 "2025-10-14T05:30:22Z")
Thank you all so much for sharing the detailed information! > [@\_MaX](#): > > Profiling session starts great > Then after a couple of minutes it starts to lag a bit > Then if you keep going, FMOD itself is starting to drop some events, and the longer the profiling session, the more often it happens, to a point where you pretty much don’t have the same behavior as the “normal version”. The dev team has already started investigating this issue, and I’ll update this thread once we have more information to share. In the meantime, some users have reported that adjusting the `Live Update Preferences` may help speed up the syncing process, which can be consider as a temporary workaround for now. ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/a/acaf22fadbc77a3dbd02be20df73beecd7fd5b22.png) > [@andrybo](#): > > Also Live Update problem: > > - the first time you run the game goes to “syncing” and then on “sync on” > - from the second time it get stuck to blinking “Syncing” (seems to work aswell but…) > - muting or soloing events the first time take like 10-15 seconds. Thank you for sharing these additional details! I have passed this Live Update issue along to the dev team for further investigation as well. ---
**Author:** ![\_MaX](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/_max/32/101_2.png) [@\_MaX](https://qa.fmod.com/u/_MaX)\ **Post date:** [October 14, 2025, 8:53am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/11 "2025-10-14T08:53:36Z")
Thank you very much @li_fmod ! ---
**Author:** ![amegliofrancesco](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@amegliofrancesco](https://qa.fmod.com/u/amegliofrancesco)\ **Post date:** [October 14, 2025, 11:12am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/12 "2025-10-14T11:12:38Z")
Another issues has arisen. When connected to the game the profile session doesn’t start up. The Live Update is On. As you can see from this video: [SwissTransfer - Send large files securely and free of charge](https://www.swisstransfer.com/d/0bed3256-91c4-47ae-89dd-f4a49861f743) ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [October 14, 2025, 10:33pm UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/13 "2025-10-14T22:33:59Z")
Thank you for sharing the video! > [@amegliofrancesco](#): > > Another issues has arisen. When connected to the game the profile session doesn’t start up. The Live Update is On. I’m having trouble reproducing this issue on my end, could I please grab a bit more info? - Which version are you using? **2.03.09** or **2.03.07**? - Are you connecting to Unity, Unreal, or a custom engine? - Do you happen to have any consistent reproduction steps I could follow? ---
**Author:** ![amegliofrancesco](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@amegliofrancesco](https://qa.fmod.com/u/amegliofrancesco)\ **Post date:** [October 15, 2025, 12:20pm UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/14 "2025-10-15T12:20:44Z")
Sure. I’m using **2.03.07** Connecting to Unity Unfortunately I don’t have an exact repo steps but It happens after few times I connect FMOD to Unity. ---
**Author:** ![amegliofrancesco](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@amegliofrancesco](https://qa.fmod.com/u/amegliofrancesco)\ **Post date:** [October 15, 2025, 12:21pm UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/15 "2025-10-15T12:21:48Z")
I’ve also noticed that if I close FMOD I still have FMOD instance running as a background process. I have to end it from the task manager. ---
**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\ **Post date:** [October 20, 2025, 2:18am UTC](https://qa.fmod.com/t/profiler-becomes-unresponsive/23298/16 "2025-10-20T02:18:18Z")
> [@amegliofrancesco](#): > > I’m using **2.03.07** > > Connecting to Unity > > Unfortunately I don’t have an exact repo steps but It happens after few times I connect FMOD to Unity. Thank you for the update! After discussing with the dev team, it seems that most of the Live Update issues have been resolved in 2.03.09. Could you please try testing with 2.03.09 and let us know if the connection issue still occurs? Additionally, our upcoming release 2.03.10 will include further improvements and fixes related to Live Update. > [@amegliofrancesco](#): > > I’ve also noticed that if I close FMOD I still have FMOD instance running as a background process. I have to end it from the task manager. Thanks for pointing that out! Could you please share a few more details about the FMOD process staying in the background? - Does it happen every time you close FMOD, or only after using Live Update? - Are you closing Unity before or after FMOD Studio when this happens? - Any error messages in the Console or Output Log? - And just to confirm, which OS are you on?