[pulseaudio-discuss] pulseaudio volume stuck at 63%

[liebrecht at grossmann-venter.com]

For anyone reading this it has been solved in thread
[pulseaudio-discuss] 100% volume limit bogus


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What is causing this and how can I fix it,

 From my keyboard controlls Volume only goes up to 63%.
Even using the mouse to drag the volume gets stuck at 63 %.

Obviously there must be another volume control inbetween pulseaudio and 
the source as a possible explanation..
See video attached.

"http://grossmann-venter.com/issues/pulseaudio/pavucontrol-MaxVolumeCanOnlyAdjustTo63%25-2019-02-08_01.31.52.mp4"