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Weird reverb issues

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    Weird reverb issues

    Hi, Unreal people,

    I just installed a 4.22.3 hotfix and a weird thing happened to all my reverbs. The send levels for all of them through all game dropped drastically, they are hardly audible now. I checked with a previous 4.20 version of the game and reverbs are there - well audible in the mix, on proper levels.

    I checked all the settings regarding audio volumes, reverbs themselves, sound attenuations and project settings. Everything should work fine, but it simply doesnt.



    Pawel, Warsaw, poland

    Maybe you enabled new audio engine(it has better reverb etc) at the engine level, on 4.22.2? That config file change would be reverted after upgrading to 4.22.3 via launcher...
    Last edited by ArthurBarthur; 07-11-2019, 06:15 AM.


      Nope, I got that fixed too. It's realted to attenuation reverb send param, which wasn't present and now is. This is also not version related - we have two computers dedicated to this game production in the studio, both running UE 4.22.3. The one that got latest project update via P4V has this new param available. The one that didn't get latest revision - no attenuation reverb send param in attenuation settings.


        Nope, new engine working for quite some time now, utilizing its. possibilities since 4.20 when the game project was born.

        Anyway, seems that we have the basic source of the problem located somehow. The prog team enabled a tool for lipsyncing NPCs to the wave amplitude, reverb distance-based sends appeared somehow on the way. I need to go through the game and set the reverb levels manually, sound per sound. I used some basic sound attenuations to start with, but most of the game (more than 80%) is mixed manually, sound by sound, cue by cue, according to particular needs.

        The game was actually already mixed, now not only the reverb is gone, but occlusions and distance attenuations sound different, too, the game got too loud and messy.

        Way over 100 hrs spent on mixing this game to the top notch level. Distance based reverb sends? Great, I don't need them for this game though. Probably need to mix the game again, sound by sound, cue per cue. Frustrating as ****, yet must be done. Nobody's fault actually, **** happens, yet I hope that the game's producer remembers my words from january that it would be really best option to mix the game as the last stage of work, not trying to do it "on the way" when lots of game design, mechanics, objects, scales change all the time, needing new mixing decisions every day. And it may always happen that one f*kked up update of the engine or function enabling may ruin the work on this field.

        And there it is.

        If anybody experienced anything like that, let mie know. If anybody has a solution to this, like reverting to previous state without having attenuation reverb sends enabled - LET ME KNOW.



          Hi Leveuho, sounds like a serious hassle!

          Just to be clear, are you saying that the NPC Lipsync is interfering with the Reverb Send amount?

          Or are you saying that the team upgraded to 4.20 and that Reverb Sends were part of the upgrade?

          Because distance-based reverb send amounts were part of the Sound Attenuation structure in the Audio Mixer from 4.15--it was one of the AudioMixer's launch features and Aaron and I demonstrated it in our February 2017 Livestream announcement of the new Unreal Audio Engine. So that should not have changed.

          If you need to mass edit data properties, you might want to check out the Property Matrix Editor which is available in the Asset Actions context menu. You can edit values on multiple assets at the same time then and it's a life-saver when tons of properties have to be changed the same way.

          Dan Reynolds
          Technical Sound Designer || Unreal Audio Engine Dev Team


            Hi Dan, so good to hear from you! I'll investigate more in an upcoming week, but the data I collected remotely from the programming team sums up to this:

            - NPC lipsync turned on,
            - attenuation reverb send on and visible in attenuation settings - i never utilised it before and never needed it for this particular game,
            - general reverb send levels went totally, totally down and need reworking via bulk edit/matrix + more manual work for sounds being sew into blueprints,
            - all operation happened on 4.22.3, we ported the project from 4.20 with no hassle at all few months ago,
            - the sound mix of the game fell somehow apart - things are louder in general, less separable, don't seem to react properly to distance change and occlusion settings,
            - I'll tell you more when I investigate more, talk to the programmers and dig into sound content, with a fresh pair of ears next week, thanks for your help a lot anyway, let's keep in touch, your assistance might be invaluable here!
            Last edited by Leveuho; 07-14-2019, 12:34 PM.


              And one more question, Dan - is it possible that the new audio engine was running with no attenuation reverb send, yet with most new engine functionalities?