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Topic: lame3100l - a constraint vbr variant (Read 35213 times) previous topic - next topic
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lame3100l - a constraint vbr variant

Reply #25 –
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.

lame3100l - a constraint vbr variant

Reply #26 –
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.
lame3995o -Q1.7 --lowpass 17

lame3100l - a constraint vbr variant

Reply #27 –
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.

lame3100l - a constraint vbr variant

Reply #28 –
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: [Select]
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 2º 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.

lame3100l - a constraint vbr variant

Reply #29 –
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.
In theory, there is no difference between theory and practice. In practice there is.
 

lame3100l - a constraint vbr variant

Reply #30 –
Yes, lowpass is 17500 now for -V1, it's 18200 for a -V level better than 0.5.
lame3995o -Q1.7 --lowpass 17