Jukka Marin wrote:

> 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 found following:
http://sourceforge.net/projects/pymp3cut/

If you know programming in C/C++, Java, Python, Perl(?) or whatever and
have some basic information about the mp3 format, coding this yourself
should be rather easy.