Dolby surround 2 too quiet

[Psymaster]

I'm using besweet with the defaults mostly to transcode ac3's into vorbis. Now, when I use stereo or surround downmix, I get nice and loud sound; when I use surround2 though, the sound is too quiet. I don't know why though. Is it something I can do with the encoder/decoder?



BeSweet v1.4 by DSPguru.
--------------------------
Using azid.dll v1.8 (b825) by Midas (midas@egon.gyaloglo.hu).
Using libVorbis.dll v1.0 ( Jul 19 2002 ) by John33 (www.inf.ufpr.br/~rja00).

Logging start : 01/16/03 , 19:20:58.

BeSweet.exe -core( -input C:\limey\vts_01_([0x80]_Audio_English_AC3(6Ch)_48kHz___)_Delay_0ms.ac3 -output C:\limey\vts_01_([0x80]_Audio_English_AC3(6Ch)_48kHz___)_Delay_0ms.ogg -logfilea BeSweet.log ) -azid( -L -3db -g 5db -n1 -s surround2 ) -ota( -G max ) -ogg( -q 0.250 ) -profile( The OggMachine v0.5 )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : C:\limey\vts_01_([0x80]_Audio_English_AC3(6Ch)_48kHz___)_Delay_0ms.ac3
[00:00:00:000] | Output: C:\limey\vts_01_([0x80]_Audio_English_AC3(6Ch)_48kHz___)_Delay_0ms.ogg
[00:00:00:000] | Floating-Point Process: Yes
[00:00:00:000] +-------- AZID -------
[00:00:00:000] | Input Channels Mode: 3/2, Bitrate: 256kbps
[00:00:00:000] | Output Stereo mode: Dolby Surround 2 compatible
[00:00:00:000] | Total Gain: 5.000dB, Compression: None
[00:00:00:000] | LFE levels: To LR -3.0dB, To LFE 0.0dB
[00:00:00:000] | Center mix level: BSI
[00:00:00:000] | Surround mix level: BSI
[00:00:00:000] | Dialog normalization: Yes
[00:00:00:000] | Rear channels filtering: No
[00:00:00:000] | Source Sample-Rate: 48.0KHz
[00:00:00:000] +-------- OGG --------
[00:00:00:000] | VBR Quality : 0.250
[00:00:00:000] +---------------------
[01:25:04:000] Gain of 10.2dB had been asserted to file.
[01:25:04:000] Conversion Completed !
[01:25:04:000] Actual Avg. Bitrate : 72kbps
[00:27:33:000] <-- Transcoding Duration
Logging ends : 01/16/03 , 19:48:31.

[frank]

For Dolby Pro Logic II:
To compensate the matrix downmix attenuation you have to apply in OTA

+10 dB gain without LFE
+14.5 dB gain with LFE

Then you'll get the original dialogue level.
When you set the dialogue normalization = on
then Azid produces a dialogue level -31 dB.
Most DVD are encoded with -27 dB. In this case you can add +4 dB gain or switch off the dialogue normalization.

I never used Gmax methods because every CD gets another level!