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how to get the lower bitrates?
amppa
post Jan 12 2002, 19:46
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So, I would like to have mp3 files close to 192 kbps. I listen mostly metal (various types - heavy, power, black, ...) and --alt-preset standard seems to create mostly bitrates of 200-250 (tested with several albums). I consider this to be too high, how should I create the files to get lower rates? Should I use ABR with --alt-preset [rate] or maybe some VBR command line (for example, edited -r3mix), using -V[n] to adjust the bitrates? Any suggestions?
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ErikS
post Mar 12 2002, 02:28
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QUOTE
Originally posted by Dibrom


The reason for this is as follows.  sfb21 is the scalefactor band which is assigned to the frequencies beyond 16khz.  However, the problem is that it doesn't actually have a scalefactor, or basically a way to efficiently compress these frequencies, while all other sfbs do.  Apparently, this was an oversight in the design process of the format, because either the developers thought frequencies beyond 16khz were inaudible (or irrelevant), or as robert suggested, maybe the format was designed for 32khz PCM as is used on DAT, which resultingly goes up to this frequency.  In any case, to actually encode these frequencies then, you have to increase the resolution of [b]all
of the sfbs, so that you can "in effect" also control the resolution of sfb21 (which, because of a lack of a scalefactor, you cannot control independently).  Make sense?


No. Sorry for beeing a bonehead, but i don't understand. Why isn't it possible to lower the other scalefactors (<21), when you add to the global scalefactor, if the only purpose is to increase resolution in sfb21? Ok, i admit that i haven't read a single line of code. I'm sure there is a reason why it's not done, but it would be interesting for me to know.

/Erik
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- amppa   how to get the lower bitrates?   Jan 12 2002, 19:46
- - tangent   I would recommend only using --lowpass (try 17.5) ...   Jan 12 2002, 20:16
- - ami   hi, hmm since ive read, that dibrom listens and en...   Jan 12 2002, 20:25
- - amppa   So, if I got it right, lame --alt-preset [rate] sh...   Jan 12 2002, 21:38
- - NeoRenegade   You got it dead on   Jan 13 2002, 23:46
- - TheBashar   I don't recall ever reading Dibrom say that with h...   Jan 14 2002, 00:56
- - Weiman   How about --alt-preset standard -V 3 -B 256? It gi...   Mar 7 2002, 21:29
- - Dibrom   My stance on this: Lowering the lowpass is by far...   Mar 7 2002, 21:57
- - mp3fan   QUOTE like employing an adaptive lowpass, with a l...   Mar 8 2002, 03:59
- - kxy   Newbie questions... when I use -alt-preset stand...   Mar 8 2002, 08:22
- - Sachankara   I still donīt see why you donīt use --alt-preset 1...   Mar 8 2002, 22:55
- - Dibrom   QUOTE Originally posted by mp3fan Currently [b]--...   Mar 8 2002, 23:42
- - kxy   Thx Dibrom. So despite the sfb21 warning, if some...   Mar 9 2002, 15:32
- - Dibrom   You don't need to use a lowpass when you use -Y. ...   Mar 9 2002, 19:10
- - kxy   Oh yea, of course I don't need to use -y and --low...   Mar 9 2002, 20:50
- - Dibrom   QUOTE Originally posted by kxy To recap, the -Y o...   Mar 9 2002, 21:03
- - mp3fan   Dibrom, QUOTE By using -Y, and disabling noise sh...   Mar 10 2002, 03:10
- - jkeating   You are forgetting about stereo settings! Right no...   Mar 12 2002, 00:04
- - Dibrom   QUOTE Originally posted by mp3fan So by using a -...   Mar 12 2002, 00:21
- - Dibrom   QUOTE Originally posted by jkeating You are forge...   Mar 12 2002, 00:24
- - ErikS   QUOTE Originally posted by Dibrom The reason fo...   Mar 12 2002, 02:28
- - JohnV   QUOTE Originally posted by ErikS No. Sorry for be...   Mar 12 2002, 03:30
- - Delirium   JohnV and Dibrom -- thanks for the explanations, I...   Mar 12 2002, 09:40
- - mithrandir   Considering that MP3s primary function is to reduc...   Mar 12 2002, 17:35
- - mp3fan   QUOTE Also, when I use an --athlower number up to ...   Mar 16 2002, 20:06
- - Dalkus   Reading through the FAQs and other threads I can...   May 4 2003, 16:30
- - SometimesWarrior   Using the -Y switch with --ap extreme carries the ...   May 5 2003, 06:36
- - Dalkus   Thanx for the reply. I'm just thinking that if...   May 5 2003, 13:30


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