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kenma
4th April 2003, 13:20
What is the difference between these Channel Modes: Surround and Surround 2 ?
Is there a guide for AC3Machine to encode WAV to AC3 to get the best results ?

regards
Ken
kenma
9th April 2003, 01:39
is there a difference for these two settings ?
tiki4
9th April 2003, 11:49
Of course there is a guide for AC3Machine. Check DSPGuru's homepage at dspguru.doom9.org (http://dspguru.doom9.org). In the guide's section you'll find everything you need.

Surround and surround2 are special modes how to retain surround information from a 5.1 channel AC3 when encoding to a 2 channel format like MP3 or Ogg Vorbis. In AC3Machine you will hardly need this because usually you will keep the 5.1 channels and just reduce the bitrate. For more information about the 'surround2' just search the forum (in short: -s surround for DPL [Dolby Pro Logic] decoder which does 2ch -> 4 ch, -s surround2 for DPL II decoder which does 2ch -> 6ch].

On thing you should know: There is a problem with AC3 files produces by BeSweet at the moment, which will not be fixed in the near future: The files ac3enc.dll (part of BeSweet) produces are very silent compared with the original AC3. I think a workaround is to set the -c normal -g max options in BeSweet (first is dynamic range compression: normal, the second is the max gain option). Check this thread (http://forum.doom9.org/showthread.php?s=&threadid=33535&highlight=volume) please for more information.

tiki4
kenma
10th April 2003, 10:19
is there any other software to re-encode ac3-material or encode a wav-file to ac3 ?
tiki4
10th April 2003, 15:12
Yes, but it isn't sold any more. It's called Sonic Foundry SoftEncode. It's also slow as molasses. Anyway, check above mentioned thread for a workaround (check Max. Gain and Dynamic Compression normal). Maybe also some of the DVD authoring programs come with an AC3 encoder. I don't know for sure, though.

tiki4
kenma
24th April 2003, 11:25
is Sonic Foundrys Soft Encode capable of encode the audio in PAL or only NTSC ?
tiki4
24th April 2003, 11:39
I don't know. I used it only for PAL so far but not on a regular basis and so I'm not very experienced with it. I think you don't run into problems if you don't convert from one format to the other.

Regards,

tiki4