Besweet: MP3 to MP2 noise

[MattO]

DSPguru,

This is my logfile:
----------
C:\BeSweet.exe -core( -input C:\Temp\life.mp3 -output C:\Temp\life.mp2 -logfile C:\TEMP\BeSweet.log ) -ota( -hybridgain ) -shibatch( --rate 48000 --twopass ) -toolame( -m s -b 128 -e )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : C:\Temp\life.mp3
[00:00:00:000] | Output: C:\Temp\life.mp2
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | PostGain normalize to : 0.97
[00:00:00:000] +------ Shibatch -----
[00:00:00:000] | Source Sample-Rate: 44.1KHz
[00:00:00:000] | Dest. Sample-Rate: 48.0KHz
[00:00:00:000] | Attenuation : 0.0db
[00:00:00:000] +------ tooLame ------
[00:00:00:000] | Bitrate method : CBR
[00:00:00:000] | MP2 bitrate : 128
[00:00:00:000] | Channels Mode : Stereo
[00:00:00:000] | Error Protection: Yes
[00:00:00:000] +---------------------
[00:07:51:446] Conversion Completed !
[00:07:51:446] Actual Avg. Bitrate : 63kbps
[00:00:39:000] <-- Transcoding Duration

Logging ends : 07/26/03 , 18:45:22.
----------

The resulting MP2 file has a distortion/squeaking/squealing noise in the left channel only, which is not in the original MP3 file.

I have tried with the Toolame -b set to 224 but the noise is still there.

The .MP3 file was created with EAC 0.9b4 using Lame.exe (19 july 2002) with the default commandline:
%l--alt-preset 128%l%h--alt-preset standard%h %s %d

Does anyone have any clues as to my problem?

thanks

MattO

[DSPguru]

1. it's unkind of you to post a partial logfile, ignoring q1 in the BeSweet FAQ (a must read before reporting BeSweet bug) :o
2. in order to eliminate the source of your bug :
2.1. try creating a 2ch wave from C:\Temp\life.mp3 using the same switches, omitting the "-toolame( )" section.
2.2 if the wave file sounds good (noise disappears), try encoding to mp2 with mp2enc.
2.3 if the noise is there again, you might wanna read this thread (http://forum.doom9.org/showthread.php?s=&threadid=19597).
3. tip - if you still have the original CD, i would advise you to let EAC feed BeSweet directly. it's not a good idea to first encode to mp3, and then transcode to mp2.


Cheers,
Dg.

[MattO]

DSPguru,

Apology's for posting a partial logfile, here is a full logfile:
--------------------------
BeSweet v1.5b19 by DSPguru.
--------------------------
Using hip.dll v1.19 by Myers Carpenter <myers@users.sf.net>
Using Shibatch.dll v0.24 by Naoki Shibata & DSPguru (shibatch.sourceforge.net).
Using tooLame.dll v0.2l (Apr 24 2003) by Mike Cheng <http://tooLame.sf.net>

Logging start : 07/27/03 , 14:38:54.

C:\TEMP\BESWEET.EXE -core( -input 1.mp3 -output 1.mp2 -logfile 1.log ) -ota( -hybridgain ) -shibatch( --rate 48000 --twopass ) -toolame( -m s -b 128 -e )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : 1.mp3
[00:00:00:000] | Output: 1.mp2
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | PostGain normalize to : 0.97
[00:00:00:000] +------ Shibatch -----
[00:00:00:000] | Source Sample-Rate: 44.1KHz
[00:00:00:000] | Dest. Sample-Rate: 48.0KHz
[00:00:00:000] | Attenuation : 0.0db
[00:00:00:000] +------ tooLame ------
[00:00:00:000] | Bitrate method : CBR
[00:00:00:000] | MP2 bitrate : 128
[00:00:00:000] | Channels Mode : Stereo
[00:00:00:000] | Error Protection: Yes
[00:00:00:000] +---------------------
[00:09:35:653] Conversion Completed !
[00:09:35:653] Actual Avg. Bitrate : 63kbps
[00:00:47:000] <-- Transcoding Duration

Logging ends : 07/27/03 , 14:39:41.
--------------------------

With the above the noise is in the left channel.

But with the following:

--------------------------
BeSweet v1.5b19 by DSPguru.
--------------------------
Using hip.dll v1.19 by Myers Carpenter <myers@users.sf.net>
Using Shibatch.dll v0.24 by Naoki Shibata & DSPguru (shibatch.sourceforge.net).
Using MP2enc.dll v1.129 (23/5/2002), Engine 1.129 <http://www.cdex.n3.net>.

Logging start : 07/27/03 , 14:42:00.

C:\TEMP\BESWEET.EXE -core( -input 1.mp3 -output 2.mp2 -logfile 2.log ) -ota( -hybridgain ) -shibatch( --rate 48000 --twopass ) -mp2enc( -m s -b 128 -e )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : 1.mp3
[00:00:00:000] | Output: 2.mp2
[00:00:00:000] | Floating-Point Process: Yes
[00:00:00:000] | PostGain normalize to : 0.97
[00:00:00:000] +------ Shibatch -----
[00:00:00:000] | Source Sample-Rate: 44.1KHz
[00:00:00:000] | Dest. Sample-Rate: 48.0KHz
[00:00:00:000] | Attenuation : 0.0db
[00:00:00:000] +------- MP2ENC ------
[00:00:00:000] | Bitrate method : CBR
[00:00:00:000] | MP2 bitrate : 128
[00:00:00:000] | Channels Mode : Stereo
[00:00:00:000] | Error Protection: Yes
[00:00:00:000] +---------------------
[00:09:35:653] Conversion Completed !
[00:09:35:653] Actual Avg. Bitrate : 63kbps
[00:00:48:000] <-- Transcoding Duration

Logging ends : 07/27/03 , 14:42:48.
--------------------------
The noise does not exist, so obviously the problem is with Toolame.

Is this a known bug? As I was hoping to use Toolame as the general opinion is toolame has better quality than mp2enc, obviously not in this circumstance though ;)

thanks

MattO

[ookzDVD]

Hi MattO,

I have some prob with you too,
all Ac3->mp2 (48->44.1) using Besweeet is full of noise.
I'm afraid it because of SSRC ? or something ?

Since VCD complaint is 44.1, so I use TMpgEnc to do
Ac3->Wav->mp2, Ac3->Wav using BeSweet is working well.

[DSPguru]

@ookz
please notice that MattO is resampling to 48k, and it actually works noiseless for him, unless he's encoding with toolame (don't know where that noise come from in this case, but didn't have the time to check).

as for resampling to 44.1khz,
this is a very old feature, and very useful one, and i'm not aware of any bug concering this feature.
please supply more details.