I have played a lot with various compressions.
For nature recordists I recommend to never use a VBR compression.
What happens is your quiet backgrounds become much more deteriorated
than what happens in highly saturated music files.
As general advise of how to compress in MP3 for nature recordings, I
recommend that you look at a spectral display of the sound and write
down the highest pitch that you wish to preserve. Then compress the
file with the highest bit rate possible using the lowest sample rate
to retain that highest pitch. If your highest pitch is 8,000 cycles
you need a sample rate of double that or 16,000 to retain that pitch.
Rich
--- In "1GDW" <> wrote:
>
> I see that there is software that will compress audio files with a
> variable bit rate. If I understand the concept the software will
> increase the bit rate when it is compressing a section with more
> data. Is that something we should be exploring?
>
> Gerald White Muscatine, IA
>
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