On Mon, 10 Jul 2006, Lee Revell wrote:
> On Mon, 2006-07-10 at 12:25 -0700, Bill Unruh wrote:
> > >
> > >> Example: sox infile -t alsa -w -s /dev/snd/pcmC0D0p
> > >
> > > That's really from the sox man page? It's totally wrong. So is the
> > > page:
> >
> > Yup that is the man page.
> >
> > .alsa ALSA /dev/snd/pcmCxDxp device driver
> > This is a pseudo-file type and can be optionally
> > compiled
> > into SoX. Run sox -h to see if you have support for
> > this
> > file type. When this driver is used it allows you to
> > open up
> > the ALSA /dev/snd/pcmCxDxp file and configure it to use
> > the
> > same data format as passed in to SoX. It works for
> > both
> > playing and recording sound samples. When playing
> > sound
> > files it attempts to set up the ALSA driver to use the
> > same
> > format as the input file. It is suggested to always
> > override
> > the output values to use the highest quality samples
> > your
> > sound card can handle. Example: sox infile -t alsa -w
> > -s
> > /dev/snd/pcmC0D0p
> > >
> > > http://www.domenech.org/bt878a-adc/alsa-e.htm
> > >
> > > Does "sox infile -t alsa -w -s plughw:1,1" work?
> >
> > No it does not. However
> > sox pluck/p6.wav -t alsa /dev/snd/pcmC0D0p
> > DOES work. (or with the -w -s option as well)
> > So it seems that sox does directly access the sound files.
>
> Why does sox abuse the ALSA API this way? Why can't it use the alsa-lib
> interface like everyone else?
Because it uses 'FILE */fread()/fwrite()' internally.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SUSE Labs
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