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We have just upgraded to UE4.10 and FMOD 1.07.03, and Im hearing a compressor pumping on the Master without any compressor actually being present on that bus. I did have one enabled some time ago before we updated, but it has since been removed. Any ideas?

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That sounds unusual. Double check you don’t have old banks in your game\content\FMOD\Desktop directory, manually deleting them if you need to and re-exporting from Studio.

Try recording a profile session. To that, run PIE in the unreal editor, then connect in FMOD Studio, open up a profile window and record.

You should be able to hear the recording and also while you are connected you can see the levels of the mixer. If you have a repro that you can hear in the profile session, you can contact support@fmod.com and we can have a look at it and see what is going on.

  • Jesse Lyon
    This issue seems to have gone away, not too sure what was causing it, maybe bad data. I am noticing some strangeness when adding a compressor on the master bus though. It seems like boosting the gain actually increases the signal going into the compressor. I can hear it pumping harder, and see more level on the compressor meter temporarily when raising the compressor gain. Is this an input gain? Id expect this to be a makeup gain on the output of the compressor.
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I’ve noticed the same thing in V1.07 Studio today, it’s like there’s a compressor with a slow release on the master buss (or HDR).

I had a rev-band, and aero playing. As I make the aero louder in sandbox, the engine started getting quieter. Quickly reduce the volume of the aero and the revband climbs back up in volume.

  • Jesse Lyon
    Hey Mark! Nice to see you here. Although Im sorry to hear you’re also seeing this issue, it is nice to hear I wasent going crazy. Oddly, it seems to have gone away for me now, so Im not sure if I just had some bad data, or there was something else going on in the chain I was unaware of. If I find out more info, I will share.
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Hey Jesse, how are you mate!!!!

Well this is a very basic project which started out as an fmod designer rev band and then imported to Studio. I can’t see anything untoward but for sure, a violent air buffet makes the engine pump if you increase the air to -8db with the engine at -11db. Very odd.

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Since no one has given the definitive answer yet. The gain setting is a makeup gain.

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If anybody has a project that demonstrates the problem, I would appreciate contacting support@fmod.com to try to track it down.

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