request for audiotagging

Al Johnson openmoko at
Fri Jun 5 14:28:54 CEST 2009

On Friday 05 June 2009, Robin Paulson wrote:
> 2009/6/5 matthias <matthiasfelsche at>:
> > recording in background during your whole osm-mapping-ride will produce
> > a huge wav-file which won't fit onto a regular sd-card. so beware of
> > that.
> 22kHz, 1 channel, 16 bit is 2.5MB/min - this is more than good enough
> quality for picking out words, etc
> a two hour trip would be ~280Mb. no problem
> we could probably go down to 11kHz, 8 bit, and not have problems -
> this would be 35MB/hr
> or, to save more space, would the freerunner be capable of encoding mp3?

I don't see why not, although a voice-specific codec like speex or gsm might 
be better.

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