Posted by fred-bloggs on 04/21/06 17:59

"Nicolas Tade" <NGinterest@gmx.net> wrote in
news:4asbi2Ftn3vtU1@individual.net:

>> The number of channels and the sampling frequency are irrelevant.
>
> So there is no change in the file size, if I use a 44.1 KHz signal
> insted of 22 KHz? Why is that?

Lossy compression, such as mp3, is about throwing bits away. To achieve
the same bit rate the encoder discards more bits from a 44.1 khz signal
than from a 22.05 khz.

>
>> The size in kbytes is 16 x duration in seconds.
>
> 16 x duration in seconds is no way the size of the final mp3 file. I
> used to multiply duration with 128 KBit/s.

Er...16 bytes _is_ 128 bits.


--
fred

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