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lame3100l - a constraint vbr variant
Kamedo2
post Sep 2 2013, 18:28
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I tried 30 diverse, both double-byte and single-byte file name wav files and it seems to be working. It's running more than 20x realtime on my Core i7 870.
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halb27
post Sep 3 2013, 12:32
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I had to do another change in order to fix this:
a) With my last change I forgot to free up the memory allocated to take up the Unicode filenames.
b) I noticed that when invoking lame3100l from the cmd prompt, it was necessary to qualify the full lame3100l path in order to make use of mp3packer.

Please download again. Sorry.

This post has been edited by halb27: Sep 3 2013, 12:34


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lame3100m --bCVBR 300
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Kamedo2
post Sep 3 2013, 14:33
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I noticed that this encoder is rather slow on speech or silent content. I remember that the quality is perceptually worse in SSE version, so they can be something to do with denormals.
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IgorC
post Sep 20 2013, 02:46
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We were discussing about how MP3 handles sharp transients in electronic music
MP3 320 kbs vs Redbook ripped to WAV topic.

Here is a result for MP3 (~300 kbps) and AAC (~192 kbps) on EIG sample (electronic music with a lot of transients)

MP3 encoder > LAME 3.100l V0
AAC encoder > Apple, QAAC tvbr q90

files: here

Log:
CODE

ABC/HR Version 1.1 beta 2, 18 June 2004
Testname:

1L = E:\Audio\EIG\eig LAME 3.100l V0.wav
2R = E:\Audio\EIG\eig Apple TVBR q90.wav

---------------------------------------
General Comments: A 2 sample is transparent

---------------------------------------
1L File: E:\Audio\EIG\eig LAME 3.100l V0.wav
1L Rating: 3.8
1L Comment:
---------------------------------------
ABX Results:
Original vs E:\Audio\EIG\eig LAME 3.100l V0.wav
5 out of 5, pval = 0.031


MP3 isn't enough good while AAC is transparent.

Edit: As usual, MP3 suffers from very audible pre-echos.

This post has been edited by IgorC: Sep 20 2013, 03:01
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GeSomeone
post Oct 27 2013, 14:54
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I noticed the the lowpass in 3100L was changed back from 18200 to 17500 (as it was before 3100g). As I did not remember this mentioned anywhere, I hereby do. It might even happened accidentally (or I missed something).
BTW I found this at -V 1 and I know it isn't a problem but I think you should be aware of it.

This post has been edited by GeSomeone: Oct 27 2013, 14:55


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In theory, there is no difference between theory and practice.
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halb27
post Oct 28 2013, 18:35
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Yes, lowpass is 17500 now for -V1, it's 18200 for a -V level better than 0.5.


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lame3100m --bCVBR 300
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