Flac - Jun 2012 - flac -- exhaustive model search vs. -A <*>?

Linda Walsh <flac at tlinx.org> wrote:
...
>     That brings up another question then... What is 'hi' (v.
low?)...
Zero, or close to zero, is low.  12 is high.

...
> What's a subset stream?
This is explained at:
http://flac.sourceforge.net/format.html

in the bulleted point beginning, "FLAC
specifies a subset of itself as the Subset
format."

...
> Another "nit" I noticed, from
> http://flac.sourceforge.net/documentation_format_overview.html
> in the inter-channel-decorrelation section -- it mentions -m vs.
> -M, where -m always uses mid+side channel whether it is bigger or not,
> while -M adaptively uses mid+side or stereo depending on which is better.
>
> Why would flac levels 7 and 8 use -m (always when -M allows adaptive
> encoding
> based on which is better?
Despite the title of -M, -m the one that is
exhaustive.  This is stated at:
http://flac.sourceforge.net/documentation_tools_flac.html#flac_options_adaptive_mid_side

Regards,
Martin
-- 
Martin J Leese
E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/

Martin Leese wrote:
> Linda Walsh <flac at tlinx.org> wrote:
> ...
>   
>>     That brings up another question then... What is 'hi' (v.
low?)...
>>     
>
> Zero, or close to zero, is low.  12 is high.
>   
----
They mention 32 as a top end, so maybe 12 isn't that slow?
I'm got encode times around 30-45 seconds on a 2 CPU machine,
which has fallen to about 10 secs/album on my current server @2.7Ghz
using ~1080% cpu...
>
>   
>
> Despite the title of -M, -m the one that is
> exhaustive.  This is stated at:
>
http://flac.sourceforge.net/documentation_tools_flac.html#flac_options_adaptive_mid_side
>   
The documentation is so clear on music optimization progs...(Lame is 
about the same).  Most people still think 320CBR is the best, though the 
authors have stated it is no better than -V0 and just wastes bits.


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At 05:47 AM 6/22/2012, Linda Walsh wrote:
>Martin Leese wrote:
>>
>>Linda Walsh <mailto:flac at tlinx.org><flac at tlinx.org>
wrote:
>>...
>>
>>>
>>>     That brings up another question then... What is 'hi'
(v. low?)...
>>>
>>
>>
>>Zero, or close to zero, is low.  12 is high.
>>
>----
>They mention 32 as a top end, so maybe 12 isn't that slow?
>I'm got encode times around 30-45 seconds on a 2 CPU machine,
>which has fallen to about 10 secs/album on my current server @2.7Ghz
>using ~1080% cpu...
This is what I use and it produces smaller (compatible) FLAC files 
then just plain -8 and you don't need -m.

flac -8 -f -A tukey(0.25) -A gauss(0.1875) -V -b 4096 file.wav

Jon