Guide: Stereo to 5.1 upmix using DPLII (2nd Ed.)

[tebasuna51]

I'm not sure if this is equivalent, but in the current ffdshow you can simply use the dolby decoder to do upmixing.

This seems to take care of everything including LFE.

So, in ffdshow, you would only need to have dolby decoder checked.
Work, but with bad channel separation:
Contents (in %) in recovered (') channels
from original channels

ffdshow Dolby decoder
FL FR C LFE SL SR
--- --- --- --- --- ---
FL' 94 7 17 - 84 9
FR' 6 97 17 - 9 82
C' 48 45 1xx - 10 10
LFE' 10 6 3 - 7 6
SL' 79 0 0 - 1xx 68
SR' 0 79 0 - 69 1xx
Where 1xx is more than 100% then clipped.

You can see Cyberlink Audio Effect (Power DVD 7) more effective recover at http://forum.doom9.org/showthread.php?p=938466#post938466
PowerDVD 6 also work like hrlslcbr say.

[OCedHrt]

Work, but with bad channel separation:
Contents (in %) in recovered (') channels
from original channels

ffdshow Dolby decoder
FL FR C LFE SL SR
--- --- --- --- --- ---
FL' 94 7 17 - 84 9
FR' 6 97 17 - 9 82
C' 48 45 1xx - 10 10
LFE' 10 6 3 - 7 6
SL' 79 0 0 - 1xx 68
SR' 0 79 0 - 69 1xx
Where 1xx is more than 100% then clipped.

You can see Cyberlink Audio Effect (Power DVD 7) more effective recover at http://forum.doom9.org/showthread.php?p=938466#post938466
PowerDVD 6 also work like hrlslcbr say.

Ah. But that's not free ^^

[tebasuna51]

Ah. But that's not free ^^

You are right. If you want a free tool you can use ATSurround plugin for Foobar2000:
ATSurround-AS2 (Foobar)
FL FR C LFE SL SR
--- --- --- --- --- ---
FL' 67 0 6 - 30 3
FR' 0 67 6 - 3 30
C' 6 6 67 - 1 1
LFE' - - - - - -
SL' 7 4 2 - 51 45
SR' 4 7 2 - 45 51
really better than ffdshow.

[OCedHrt]

Thanks :)

But I've already tried. I get a sharing violation on the destination file after about 62 minutes into the audio when converting to 6ch WAV.

BTW, how do you check/generate that information in the table?

[tebasuna51]

I get a sharing violation on the destination file after about 62 minutes into the audio when converting to 6ch WAV.
Sorry, I forgot answer you.
Problems with big file size? Greater than 2 GB or 4 GB?
BTW, how do you check/generate that information in the table?
I use a test channel (with channels independents in time) then:
wav6 -> Downmix -> wav2_dpl -> Upmix -> wav6'
And I compare (volume and phase) output channels with input channels.
Of course with real sounds isn't so easy because channel coupling/cancellation, but at least the procedure must work with independents channels.

There are a new plugin for Foobar foo_dsp_fsurround (http://www.hydrogenaudio.org/forums/index.php?showtopic=52235)
with better performance with dpl 2.

[plomon]

Here's the screenshot when I tried to load Intervideo Audioprocessor Fx in Graph Edit:

http://img49.imageshack.us/img49/299/intfxbh5.jpg

There is no input/output pin to this module to connect anything....what kind of a weird error is this.