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Lossy Audio Compression => MP3 => MP3 - Tech => Topic started by: Sebastian Mares on 2003-10-11 16:18:55

Title: Strange behaviour with MMJB's Joint Stereo
Post by: Sebastian Mares on 2003-10-11 16:18:55
Hello!

I have just created some MP3 files from an album using MusicMatch Jukebox 8.1 Basic and noticed the following thing: although Joint Stereo was used, all frames use Simple Stereo mode. That is also what EncSpot shows me. There is NO frame using Mid/Side stereo. I have also tried several other albums but I got the same result - only SS frames. Is that a bug?

PS 1: I have encoded at 192 kbps (CBR).
PS 2: I usually use EAC together with LAME 3.90.3 (--alt-preset standard), so don't flame me.
Title: Strange behaviour with MMJB's Joint Stereo
Post by: ff123 on 2003-10-11 21:57:07
Quote
Hello!

I have just created some MP3 files from an album using MusicMatch Jukebox 8.1 Basic and noticed the following thing: although Joint Stereo was used, all frames use Simple Stereo mode. That is also what EncSpot shows me. There is NO frame using Mid/Side stereo. I have also tried several other albums but I got the same result - only SS frames. Is that a bug?

PS 1: I have encoded at 192 kbps (CBR).
PS 2: I usually use EAC together with LAME 3.90.3 (--alt-preset standard), so don't flame me.

Yes, Fraunhofer's FastEnc codec uses stereo for bitrates of 160 kbit/s (I think) and up, as reported by Encspot.  It's not an Encspot bug, but a FastEnc bug (or feature, if you like).

ff123
Title: Strange behaviour with MMJB's Joint Stereo
Post by: Sebastian Mares on 2003-10-12 08:31:59
Quote
It's not an Encspot bug, but a FastEnc bug (or feature, if you like).


Oh, yes... I didn't mean if it is a bug in EncSpot, but in MMJB's encoding engine.

Anyway, why isn't it using stereo entirely? I mean, why does it put "Joint Stereo" in the frame header, rather than "Stereo"?
Title: Strange behaviour with MMJB's Joint Stereo
Post by: Joe Bloggs on 2003-10-12 11:17:31
Why aren't you using LAME?
Title: Strange behaviour with MMJB's Joint Stereo
Post by: Old Nick on 2003-10-12 23:09:58
Is it possible to use the codec that comes with MMJB without actually having to use MMJB?
Title: Strange behaviour with MMJB's Joint Stereo
Post by: joto on 2003-10-13 01:44:54
This appears to be normal behavior for FhG codecs, not a bug in MMJB.

Adobe Audition 1.0 gives you a choice of 3 mp3 codecs: (1) "Current - Best Quality", (2) "Legacy - High Quality", and (3) "Legacy - Medium Quality".

With all three at 192 CBR, you get joint stereo with 100% encoded LR.
Title: Strange behaviour with MMJB's Joint Stereo
Post by: yourtallness on 2003-10-13 07:36:48
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Adobe Audition 1.0 gives you a choice of 3 mp3 codecs: (1) "Current - Best Quality", (2) "Legacy - High Quality", and (3) "Legacy - Medium Quality".


I was under the impression that Cool Edit/Adobe Audition uses only fastenc. If
so, why do they give u a choice between 3 codecs?
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