Convert Multichannel Wav File to Mp3 with Besweet?

[Steffi]

Hi!

Got no problem here, just wanted to re-assure, that the thing I produce, is the right thing:

1.) got a nero avc file with surround aac sound
2.) ripped the audio with aacdrop to one single channel wav files
3.) splitted the single wav file with tranzcode to 6 mono wav files
4.) renamed them like mentioned in the besweet faq and wrote a mux file
5.) now, it comes: I want to compress the 6 channel wav files to a stereo mp3 file (with lame), taking the mux file as input.

It does not work, the sound is like "garbled". My question now: is this the right way to do so? Or which way is better? Direct conversion from AAC to Stereo wav with Foobar?

Greetings,


Steve

[tebasuna51]

I use Foobar with:
- Active the DSP Foobar plugin ATSurround decoder 0.9.5 (foo_dsp_atsurround.dll) to downmix 5.1 -> 2 chan Dolby Prologic compliant.
- Convert Settings -> Output Presets: LAME configured with your parameters
- Convert Settings -> Processing: Use DSP checked

Then open the aac and Convert directly to mp3.

With BeSweet I don't know any way (maybe a external plugin) to downmix 6 chan wav -> 2 chan.
Only, when the input is ac3, the azid.dll can do this.

[tebasuna51]

I found in http://besweet.notrace.dk/plug-ins.htm Downmix v0.2 a plugin for Besweet.
In order to make a downmix 5.1 -> 2.0 Dolby Prologic II, the BS_Downmix plugin use this matrix:

Sour/Dest 0-LEFT 1-RIGHT (Ac3_Ord Wav_Ord)
--------- ------- ------- ------- -------
Channel_0 0.3225 0 Front_L Front_L
Channel_1 0.2280 0.2280 Center Front_R
Channel_2 0 0.3225 Front_R Center
Channel_3 -0.2633 0.1862 Back_L LFE
Channel_4 -0.1862 0.2633 Back_R Back_L
Channel_5 0 0 LFE Back_R

Like you can see this matrix (the LFE channel is lost) need a mux file in ac3 order. Then :
BeSweet -core( -input "Ac3_ord.mux" -output "output.mp3" ) -plugin( -name BS_Downmix.dll -func NoLFE -6ch ) -lame( "parameters" )
works for me.

I can't understand why this plugin need ac3 order. If the source is an ac3, azid do this function (and more), if the source is another multichannel format (dts, aac, ...) remapping channels is always necessary.

[Steffi]

Thanx for telling me that.

In the first way, I wanted to convert the aac file to ac3 and then to mp3, but I recognized, that the resulting mp3 (with appropriate bitrate) is bigger in size than the aac file.

Dont know why, but i still have some reservation over mp4. But converting to xvid and mp3 only lowers quality and takes my precious spare time :-)

I am also not to technical in the audio conversion, so thx anyway for providing that information. If I got time, I will try that plugin (maybe, others need that info too)

Greetings,

Steve

[[)370|\|470!2]

I use Foobar with:
- Active the DSP Foobar plugin ATSurround decoder 0.9.5 (foo_dsp_atsurround.dll) to downmix 5.1 -> 2 chan Dolby Prologic compliant.
- Convert Settings -> Output Presets: LAME configured with your parameters
- Convert Settings -> Processing: Use DSP checked

Hey mate, do you know perhaps of some working links to it?
Since atjs page seems to be down :|

[tebasuna51]

I don't found others links. I can offer my copy for a few days in:
http://www.cdmontecanal.com/img/atsurrou.zip

Edit: dead link

[[)370|\|470!2]

Oh, thanks a lot! :thanks: