search

Nevcairiel / LAVFilters

LAV Filters - Open-Source DirectShow Media Splitter and Decoders
GNU General Public License v2.0
7.19k stars 786 forks source link

LAV Audio Mixing. Wrong channel mixing when use 5.1 to 2.0 (Stereo) downmix #598

Closed ValoWaking closed 1 month ago

ValoWaking commented 1 month ago

Hi. The problem is wrong channel mixing when use downmix from 5.1 to 2.0 channels. Voice (center channel) is too quiet compared to other channels. "Normalize matrix" function is not work properly and not fix this. You need add front speakers volume configuration to mixing settings for right manual setup sound matrix. It is also necessary to expand the volume control of each channel separately from 0 to 2 for better control. Also you need add some manual setting for "Normalazi Matrix" cause now this work very bad

lav

Nevcairiel commented 1 month ago

There are no plans for any changes, the existing options cover all requirements.

ValoWaking commented 1 month ago

But if front channel have too much volume we can't normalize mixing matrix manually. And result of it - u can't hear central chanel and voice. Thats why function where u can decrease volume of front channel is really needed

U can try it by yourself - just download Transformers part 1 and test speech levels. Only one thing that can fix it is inbuilt to player "Normalizer". But this Normalizer gives sound artefacts.

I already tested it with two players - KMPlayer and MPC-BE - all is the same