[williambarty]

I'm using Kodi for Windows.

I use the stereo upmix feature (system-->audio-->stereo upmix on) to get 5.1 audio from my stereo music.  It does a really good job of creating a nice surround effect for music that's not natively multichannel.

My issue is that the rear 2 channels are consistently about 7db too loud when using Kod's stereo upmix feature.  When I play native multichannel music or videos, the channel balance is correct -- the issue only occurs when using stereo upmix.

I can do an adjustment using option-->channel level adjust on my Denon receiver to reduce the rear 2 channels by 7db each.  However, the adjustment doesn't stick, so I need to do it every time I power on the receiver.   I don't want to do the level adjustment in the receiver's main speaker balance setting because that would make the rear speakers too soft for native multichannel sources.

Is there a way in Kodi that I can adjust the volume of the rear 2 channels when using stereo upmix to correct this in a sustainable way?

Thanks for any help or suggestions!

[jjd-uk]

The rear channels should be simply receiving a duplicate of the front channels, so are you saying the rears are louder than the fronts? as they should be the same volume. Or is it the rears being the same volume the issue, as they are closer to your listening position.

[williambarty]

Thanks for your note.  I had understood that stereo upmix involves more more processing (i.e. algorithms) than just duplicating the front channels to the back.  It might be my imagination, but it sounds like I'm hearing a different mix in back, which gives a synthetic spatial effect (not true multichannel, but similar).

[jjd-uk]

See https://github.com/xbmc/xbmc/blob/master...#L161-L177

What this essentials means is Stereo channel 0 (left) is sent to all left side channels (front, side, back), Stereo channel 1 (right) is sent to all right side channels (front, side, back), then Center & LFE is 50% left & 50% right.

[williambarty]

Thank you for clarifying!