Julio Merino wrote:

> On Sat, Apr 27, 2002 at 07:52:19PM +0300, Jukka Marin wrote:
> > Dear List,
> > 
> > Do you know of a NetBSD compatible software which would let me split
> > big mp3 files (essentually, cut extra stuff at the beginning and end
> > of file) without decompressing and compressing the files (which lowers
> > the quality)?
> 
> I'm just working in such a program ;) But for now, I'm only adding
> support to wav files because I haven't found a decent documentation
> about MP3 :( If you have any point to it...

Read the ISO/IEC 11172-3 standard (rather expensive).
Analyse the sources of MAD or mpg123 (cheap, but maybe more difficult).