Pulseaudio volume control, once installed, revealed that each channel - especially front channels were at low volume. moving any of the 6 volume sliders in Pulseaudio volume fixed the problem by setting all channels to equal volume.
Pulseaudio volume control, once installed, revealed that each channel - especially front channels were at low volume. moving any of the 6 volume sliders in Pulseaudio volume fixed the problem by setting all channels to equal volume.