Re: Adjusting sound file volume
On Sat, 25 Feb 2012 21:48:31 -0700
Bob Proulx <bob@proulx.com> wrote:
> Marc Shapiro wrote:
> > I know that sox can adjust the volume of a sound file and I have
> > used it before, but... sox will not read this file. It is an .m4a
> > file that someone else recorded and sent to us. Sox and play will
> > not read it, the error when try to adjust the volume is:
> >
> > :~$ sox -v 0.1 Kedushah.m4a Kedushah.mp3
> > sox FAIL formats: can't open output file `Kedushah.mp3': SoX was
> > compiled without MP3 encoding support
>
> The problem is that the mpeg formats are patented. They are not
> freely available.
>
> http://en.wikipedia.org/wiki/MP3
>
> That prevents them from being available in Debian. It doesn't meet
> the DFSG.
>
> If you get the version of sox built with the non-free mp3 libraries
> then it should play it. I have not installed it but I believe that
> such a version is available from the http://debian-multimedia.org/
> Marillat site. Please be kind to them and use a mirror to keep their
> bandwidth use reasonable.
Is it really true that mp3 playback, as opposed to encoding, is not
available without software from multimedia? I have no repos in my
apt.sources except for the official squeeze + backports, and mplayer
plays mp3s fine.
Celejar
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