Reply to Re: Suggestion for compression settings ?

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Posted by fred-bloggs on 11/16/80 11:37

Wes Groleau <groleau+news@freeshell.org> wrote in news:nJ%yf.11345
$Zo.2530@trnddc07:

>
>
> Wes Groleau wrote:
>> Bummer. .....
>
> More bummer: --comp has no effect--values from
> 21 to 35 produce the same output filesize.
>
> -s 32 and -s 48 are both larger than leaving it
> unspecified. -s 22.05 is largest of all.
> For all four, the log header claims it is using 44.1 K
>
> I'm so confused!
>

http://lame.sourceforge.net/doc/html/switchs.html

The standard bit rates (-b) for mp3 are 8,16,24,32,40,48,56,64.
32 corresponds to -comp 44. The size of your output file is determined
solely by the bitrate, the resampling and downmixing serve to improve the
quality - you are encoding less information into the same number of bits.

-s refers to the source sampling frequency,
-resample sets the *output* sampling frequency.

-a downmixes stereo to mono.

So try
-b 32 -a --resample 11.025 --highpass 5

(the highpass frequency should always be less than half the sampling
frequency or you will get aliasing noise)



--
fred

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