Usually this results in ~170 to ~220 kbps files
Natural. VBR targets quality, not bitrate. Loud metal has a lot of HF in cymbals, etc., which LAME allocates more bits to achieve a given quality.
Furthermore (if it's not a bug), isn't it just better to encode in 192kbps and get a smaller file, since that's the quality I was going for anyway?
If you really want the best quality while restricting to this approximate bitrate then use abr 192 instead.
Two ways to workaround (workaround not equal fix) this is either use something lower than -V2 (like -V3), or use -V2, -V1 or -V0 with the additional -Y parameter.
Regarding -Y, doesn't it kick in with -V settings greater than 2 (such as 2.1), or is it at 3 and higher?
Consequently, is the only real answer to the -Y question to encode some files without -Y and also with -Y, then try to ABX them and if you can't hear a difference, you might as well use -Y to save space?
Quote from: Aleron Ives on 29 March, 2010, 11:59:09 PMConsequently, is the only real answer to the -Y question to encode some files without -Y and also with -Y, then try to ABX them and if you can't hear a difference, you might as well use -Y to save space?Pretty much, yes, though you might want to include -V3 in your testing.
It was not too long and is well worth reading, benski; at least what was labeled "short and concise". I think it's very worthy to be in the wiki provided that it is technically accurate (I have no reason to think it isn't technically accurate).
I suggest not to fiddle with -Y . If you want a lower bitrate and still keep reasonable quality: V3V2 - Y is hardly better than V3 on problem samples. Also -Y will totally change the mp3 bitrate distribution and quality is affected - whether you hear it or not.
I would like an answer from robert, or someone that has studied this part of the code.My interpretation of what i've heard is that in CBR mode, the code works in a way that increases the resolution only if enough bits are free and only by the amount the free bits allow. (Effectively, trying to maximize the quality for the given amount of bits).In other words, at 320kbps, it would be working more like -V0 (without -Y), and at 192kbps would be working more like -V3 (with -Y)
@Aleron : Your explanation of the subject is correct and correlates to what i've written. I will use part of your tests to make the technical part more understandable.