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Hydrogenaudio Forums > Lossy Audio Compression > MP3 > MP3 - General
Goomba
Hi!! im new here and nb in the mp3 enc (lame enc biggrin.gif ) world..

i encode a mp3 using lame enc 3.97a11 with the latest version of CDex and the preset:
--alt-preset insane and before i use EncSpot to see the info that the program show about the mp3 and my surprise is: UnWise Settings= Yes <-- how about that thing?? i tried to "swith" and use cbr 320 Very High Quality (q=0) in CDex and EncSpot Say the Same Thing.. and i tried to swith to another version of lame and do the same thing (3.90.3 and 4.0 a14) and that UnWise Settings says= No.

between lame versions 3.90.3 and 4.0 a14.. UnWise Settings= Yes blink.gif

What Happend?? blink.gif

and sorry but my english is poor because that's not my primary languaje but i do my best!! rolleyes.gif

thanks buddies!!! biggrin.gif
Goomba
i forgot something!! blink.gif

that unwise ONLY say Yes in cbr 320 kbs in others bitrates (cbr, vbr, abr) says No

thanks again!! smile.gif
Digga
since this is an alpha build of LAME maybe the unwise setting is falsely written.
or you have some additional commands in CDex that cause the presets to be overwritten (I don't use CDex, so I wouldn't know).
adaaaam
I encode with 3.96.1 using --preset insane -ms and have also noticed Unwise Settings; Yes in my EncSpot analysis. What does that do anyway? Ripped in EAC

Also in the lame header the quality used to say 58 when I used 3.90, now it says 57 with 3.96. What's that do also?
DreamTactix291
The -ms switch gives you Unwise Settings = yes adaaam. That forces LAME to use simple L/R stereo instead of being able to go between M/S and L/R which is the default. From a quality point of view -ms is theoretically lower.

The quality numbers are a throwback of the old Xing tags which the LAME tag is based off of.
adaaaam
So what does the quality index represent? The quality of the MP3 based on some complex formula? Why am I 1 point lower with 3.96?
DreamTactix291
-V setting + -q setting combined.

3.90.3 used -q2 and 3.96.1 used -q3 (which are really the same thing as when the current -q0 was added it bumped all the other numbers down). So because the -q number is one higher the quality number in the LAME tag is one lower.

As said before the number is just a legacy thing and really useless. I can make 100 quality files that sound like total garbage. 3.96.1 -V2 is 77 and doesn't sound like total garbage smile.gif
adaaaam
Well I removed the -ms and just used --preset insane in 3.96 and it still says unwise settings: yes. What am I doing wrong?

In 3.90 when I do --alt-preset insane or --alt-preset insane -ms they both yield unwise settings: no.
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