blaubär Posted April 1, 2019 Share Posted April 1, 2019 I tried to find out what exactly the limiter does and how it affects distortion. On my Samsung S7 with Oreo and build 823 ( high-res, sampling rate 44.1 kHz, wired headphones ) I chose a song ( mp3, 44.1 kHz ) with a significant amount of bass.Then I activated Tone and EQ and set the bass in both to maximum level, including the eq-preamp. I expected to hear distortions, which would then be diminished after I would have activated the limiter. I would try that both for DVC and non-DVC and didn't expect a difference there. Result : without DVC I heard distorted sound, limiter or no limiter didn't make a difference. With DVC I didn't hear distortions, again the limiter didn't make a difference. Question : Bug or Feature ? I'd say bug : the limiter should have prevented the distortions. That there were no distortions with DVC might be a feature of DVC - but then I'd expect the limiter button to be inactive. Link to comment Share on other sites More sharing options...
andrewilley Posted April 1, 2019 Share Posted April 1, 2019 I would assume that with DVC on, Poweramp has more processing headroom than it does with DVC off. Andre Link to comment Share on other sites More sharing options...
blaubär Posted April 1, 2019 Author Share Posted April 1, 2019 (edited) 26 minutes ago, andrewilley said: I would assume that with DVC on, Poweramp has more processing headroom than it does with DVC off. If that were the case one would expect the music to become louder when DVC is switched OFF. But it's the other way round : the music gets louder when I switch DVC ON. I found a theory as to what DVC does in https://www.head-fi.org/threads/best-android-music-player-app.638387/page-2 That's the Direct Volume Control feature kicking in. It adjusts the system volume such that if you do boosts in the graphic EQ, what it does instead is boost the system volume then apply EQ cut to everything except the boosted band. That might explain both the vanishing distortions and the higher volume level with DVC on. Edited April 1, 2019 by blaubär additional info Link to comment Share on other sites More sharing options...
blaubär Posted May 7, 2019 Author Share Posted May 7, 2019 So with DVC the limiter doesn't need to limit. But without DVC it should limit, but it doesn't. So that's a bug ? Link to comment Share on other sites More sharing options...
blaubär Posted May 7, 2019 Author Share Posted May 7, 2019 Shouldn't the limiter mitigate all the bass distortions that users complain about ? If it doesn't, what's it for ? Link to comment Share on other sites More sharing options...
blaubär Posted May 7, 2019 Author Share Posted May 7, 2019 I could think of two ways a limiter could work : - compress the dynamics, as shown in the wikipedia : - preventively reduce the pre-amplification by the amount of the highest eq increase minus headroom But it seems it does neither. @maxmp : what does the Limiter do ? Link to comment Share on other sites More sharing options...
Alexmercer910 Posted February 11, 2021 Share Posted February 11, 2021 Hi there, i seem to be having the same issue with my Poweramp but only after unofficially updating to android 11, it seems like the bug only exists on the new OS that i installed, so maybe its a device specific issue, but still im trying to figure it out, maybe it has something to do with the audio codecs installed with the ROM or something, im not sure yet. Link to comment Share on other sites More sharing options...
andrewilley Posted February 11, 2021 Share Posted February 11, 2021 @Alexmercer910 What exact issue are you getting? Andre Link to comment Share on other sites More sharing options...
Mths Posted January 23, 2022 Share Posted January 23, 2022 I'm also trying to know how exactly the limiter will affect my sound output. Per example, what settings is the app limiter operating on? Link to comment Share on other sites More sharing options...
andrewilley Posted January 23, 2022 Share Posted January 23, 2022 Basically if the processed sound would peak over the digital maximum level (100%) then PA will reduce the gain to avoid clipping. Andre Link to comment Share on other sites More sharing options...
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