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Sound volume fluctuation from low to normal at random


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Sound volume fluctuation from low to normal at random, volume just dips down for a 1-3 seconds and goes back, it repeats in 1-5 seconds again.
It have something to do with Direct Volume Control, because when i disable it everything becomes normal again and never bugs out while it off.
Switching off and on every other option in audio settings or equaliser/effects doesn't help.

It's very annoying, please do something with it.

Phone - Meizu MX4 on stock firmware Flyme OS 5.1.3.0A, Android version 5.1

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New information update.

1. it happens only when Output set to OpenSL ES Output AND Direct Volume Control is On

2. it happens even with all other apps closed

3. it may or may not happen even with Output set to OpenSL ES Output if phone screen is Off

4. it will happen 100% of times when Output set to OpenSL ES Output AND phone screen is On, lockscreen or player UI, no matter what.

5. Restore Defaults everywhere doesn't resolve the issue

6. maybe it doesn't happen with Output set to OpenSL ES Output and music playing through phone speaker, i can't say for sure because not enough testing.

7. it doesn't happen if i set Output to Audio Track Output.

 

Next post is settings for more information. Changing buffer sizes and quantity of buffers doesn't change anything.

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