Matrix mixer (allows to upmix stereo movies to multichannel at playback time)

Valex · 18th March 2003, 09:17

I've started a new project that allows simple stereo to multichannel upmix for any stereo source. I need your opinions about this thing...

http://matrix-mixer.sourceforge.net (homepage)
http://prdownloads.sourceforge.net/m...a.exe?download (direct download)

ookzDVD · 18th March 2003, 10:34

Wow... nice filter,
It's just like the http://www.trombettworks.com/directshow.php

Can't wait to test it

Edit: I think there is a problem while playing vorbis files,
I use the "ancient" Tobias's OggDS 0.9.9.5, and the MPC 6.4.3.5. is stopped.

frank · 18th March 2003, 17:01

The start of a software DPL2 decoder?

I'm very pleased Alexander, and I think you should direct your development in that direction.

ohliuv · 18th March 2003, 17:20

mmm, what's the difference between the matrix-mixer and the Moonlight Odio Dekoda?

Valex · 18th March 2003, 21:54

@ohliuv
Odio Decoda is a decoder, MatrixMixer is a mixer (obviously

)

@frank
Yes, but it is a very first step...

@ookzDVD
Can you send me a little part of this file? (~500K-1M)

ohliuv · 19th March 2003, 10:05

it's a very nice filter

made a couple of tests of the 2ch->5.1ch upmix using avi-s with mp3 VBR soundtrack. the ones encoded at 128kbps (DSPguru preset of BeSweetGUI)sound very good to me. havent checked higher bitrates yet, but should be even better.
I also checked another one at 96kbps (downmixed from ac3 most probably by GraphEdit and iviaudio). it is still OK, hoever there is slight noice and crackling from the C, SR, and SL speakers - just slight, and only from time to time. Pretty nice for a 96kbps mp3

I remember DSPguru recommending to encode mp3s at 160+ in order to preserve the surround information in the audio. Can you recommend BeSweet settings for better upmix 2ch->5.1 during playback?

mikeson · 19th March 2003, 12:14

@ohliuv:

lame --alt-preset standard or Ogg Vorbis at -q 0.6 should be enough...

tiki4 · 19th March 2003, 12:22

Who is encoding MP3 without --alt-preset standard nowadays???

O.K.,

did anyone test yet a file that was encoded with -s surround2 in BeSweet? I will do it myself these days but unfortunately I don't have very much time at the moment.

The question is if the surround image get's reproduced correctly for example in an action movie where a bullet flies from the left to the right (or vice versa).

Regards,

tiki4

arty · 20th March 2003, 08:06

I tried the matrixmixer with a movie containing 128kbit mp3(fast&furious) & it works perfectly! I used it with an nforce2 motherboard/DD51 encoding and the sound was really good! Much better than the usual mp3-PCM-spdif-DPL_decode via amp mode!

Valex, thank you very much !

ookzDVD · 20th March 2003, 08:09

Quote:

Originally posted by Valex

@ookzDVD
Can you send me a little part of this file? (~500K-1M) [/B]

Ok, I just mail you the file.

ChristianHJW · 20th March 2003, 20:10

/me is looking forward to be able to play DPL2 encoded stereo tracks on his PC, encoded with MPC at 180 - 190 kbps, with nice and clean surround sound coming out of his surround system

.... reminds me i finally have to buy a new soundcard now ...

arty · 24th March 2003, 08:27

mp2 does not work. when I try to play an mpeg, no sound at all! Tried on 2 computers, no success.

Azzjw · 27th March 2003, 10:53

Excellent filter - love the sound difference.
Is it possible to have the option for stereo for FL & FR matched with the Same Stereo source for RR & RL.
This will effectively give me Music in 2 locations using my receiver & speakers and also create a better amplified environment when in the same room.
Also, how hard is it to implement Stereo to AC3 realtime encoding with the functionality similar to this Matrix mixer. I would love the capability of the NForce2 Sound system without having to buy the actual motherboard.
Ive noticed there is a realtime encoder on sourceforge, but it is at an early stage.
Anyway keep up the good work!
Azz

arty · 27th March 2003, 11:40

azzjw: could you link that ac3 encoder page (on sourceforge.net) ?

I couldn't find it.

Azzjw · 27th March 2003, 11:55

This is it arty http://sourceforge.net/projects/ac3encode
Cheers.

arty · 27th March 2003, 13:35

Thank you

DIggedy · 28th March 2003, 02:33

Nice!
Is there or will there be a way to write the output to 6x mono wavs for use in encoding to ac3/dts?
Keep up the great work!

mikeson · 28th March 2003, 09:13

@DIggedy:

Quote:

Is there or will there be a way to write the output to 6x mono wavs for use in encoding to ac3/dts?

It is already here IMHO. BeSweet does it, doesn't it?

Rrrough · 28th March 2003, 12:30

@Valex:

great development, you rock!

cheers

DIggedy · 2nd April 2003, 02:28

Quote:

BeSweet does it, doesn't it?

I'm talking about taking a stereo file, applying DPLII encoding to create the 6 channels and then outputting the result as 6 mono wavs (basically an automated stereo>5.1 conversion) that can be used for encoding to other formats. Correct me if I'm wrong (DSP Guru?) but I'm pretty sure Besweet doesn't do this.

18th March 2003, 09:17	#1 \| Link
Valex Registered User Join Date: Sep 2002 Posts: 144	Matrix mixer (allows to upmix stereo movies to multichannel at playback time) I've started a new project that allows simple stereo to multichannel upmix for any stereo source. I need your opinions about this thing... http://matrix-mixer.sourceforge.net (homepage) http://prdownloads.sourceforge.net/m...a.exe?download (direct download)

18th March 2003, 10:34	#2 \| Link
ookzDVD DVD Rebuilder! Join Date: Oct 2001 Posts: 1,147	Wow... nice filter, It's just like the http://www.trombettworks.com/directshow.php Can't wait to test it Edit: I think there is a problem while playing vorbis files, I use the "ancient" Tobias's OggDS 0.9.9.5, and the MPC 6.4.3.5. is stopped. Last edited by ookzDVD; 18th March 2003 at 10:41.

19th March 2003, 10:05	#6 \| Link
ohliuv Registered User Join Date: Oct 2001 Location: Belgium Posts: 113	it's a very nice filter made a couple of tests of the 2ch->5.1ch upmix using avi-s with mp3 VBR soundtrack. the ones encoded at 128kbps (DSPguru preset of BeSweetGUI)sound very good to me. havent checked higher bitrates yet, but should be even better. I also checked another one at 96kbps (downmixed from ac3 most probably by GraphEdit and iviaudio). it is still OK, hoever there is slight noice and crackling from the C, SR, and SL speakers - just slight, and only from time to time. Pretty nice for a 96kbps mp3 I remember DSPguru recommending to encode mp3s at 160+ in order to preserve the surround information in the audio. Can you recommend BeSweet settings for better upmix 2ch->5.1 during playback? Last edited by ohliuv; 19th March 2003 at 10:15.

19th March 2003, 12:14	#7 \| Link
mikeson Registered User Join Date: Dec 2001 Location: Czech Republic Posts: 261	@ohliuv: lame --alt-preset standard or Ogg Vorbis at -q 0.6 should be enough... __________________ mikeson

27th March 2003, 10:53	#13 \| Link
Azzjw Registered User Join Date: Mar 2003 Location: Oz Posts: 3	Excellent filter - love the sound difference. Is it possible to have the option for stereo for FL & FR matched with the Same Stereo source for RR & RL. This will effectively give me Music in 2 locations using my receiver & speakers and also create a better amplified environment when in the same room. Also, how hard is it to implement Stereo to AC3 realtime encoding with the functionality similar to this Matrix mixer. I would love the capability of the NForce2 Sound system without having to buy the actual motherboard. Ive noticed there is a realtime encoder on sourceforge, but it is at an early stage. Anyway keep up the good work! Azz __________________ Choose life....

18th March 2003, 17:01	#3 \| Link
frank Registered User Join Date: Oct 2001 Location: Germany Posts: 793	The start of a software DPL2 decoder? I'm very pleased Alexander, and I think you should direct your development in that direction.

18th March 2003, 17:20	#4 \| Link
ohliuv Registered User Join Date: Oct 2001 Location: Belgium Posts: 113	mmm, what's the difference between the matrix-mixer and the Moonlight Odio Dekoda?

18th March 2003, 21:54	#5 \| Link
Valex Registered User Join Date: Sep 2002 Posts: 144	@ohliuv Odio Decoda is a decoder, MatrixMixer is a mixer (obviously ) @frank Yes, but it is a very first step... @ookzDVD Can you send me a little part of this file? (~500K-1M)

19th March 2003, 12:22	#8 \| Link
tiki4 Registered User Join Date: Dec 2001 Location: Who Knows? Posts: 929	Who is encoding MP3 without --alt-preset standard nowadays??? O.K., did anyone test yet a file that was encoded with -s surround2 in BeSweet? I will do it myself these days but unfortunately I don't have very much time at the moment. The question is if the surround image get's reproduced correctly for example in an action movie where a bullet flies from the left to the right (or vice versa). Regards, tiki4

20th March 2003, 08:06	#9 \| Link
arty Registered User Join Date: Jul 2002 Location: Budapest, Hungary Posts: 45	I tried the matrixmixer with a movie containing 128kbit mp3(fast&furious) & it works perfectly! I used it with an nforce2 motherboard/DD51 encoding and the sound was really good! Much better than the usual mp3-PCM-spdif-DPL_decode via amp mode! Valex, thank you very much !

20th March 2003, 20:10	#11 \| Link
ChristianHJW Matroska Team Join Date: Nov 2002 Location: Bavaria - Germany Posts: 1,341	/me is looking forward to be able to play DPL2 encoded stereo tracks on his PC, encoded with MPC at 180 - 190 kbps, with nice and clean surround sound coming out of his surround system .... reminds me i finally have to buy a new soundcard now ...

24th March 2003, 08:27	#12 \| Link
arty Registered User Join Date: Jul 2002 Location: Budapest, Hungary Posts: 45	mp2 does not work. when I try to play an mpeg, no sound at all! Tried on 2 computers, no success.

27th March 2003, 11:40	#14 \| Link
arty Registered User Join Date: Jul 2002 Location: Budapest, Hungary Posts: 45	azzjw: could you link that ac3 encoder page (on sourceforge.net) ? I couldn't find it.

27th March 2003, 11:55	#15 \| Link
Azzjw Registered User Join Date: Mar 2003 Location: Oz Posts: 3	This is it arty http://sourceforge.net/projects/ac3encode Cheers. __________________ Choose life....

27th March 2003, 13:35	#16 \| Link
arty Registered User Join Date: Jul 2002 Location: Budapest, Hungary Posts: 45	Thank you

28th March 2003, 02:33	#17 \| Link
DIggedy Registered User Join Date: Aug 2002 Location: Sydney, Australia Posts: 157	Nice! Is there or will there be a way to write the output to 6x mono wavs for use in encoding to ac3/dts? Keep up the great work!

28th March 2003, 12:30	#19 \| Link
Rrrough Registered User Join Date: Aug 2002 Location: Avantasia Posts: 177	@Valex: great development, you rock! cheers