Very Computer

1. How to play .au files (reliably)

Hi,

        This must be a FAQ but I haven't seen it anywhere and I've checked
the new Sound HOWTO.  I'm trying to play sun .au files.  There is no problem
playing files sampled at 8000Hz, mono - I can just cat them to /dev/audio.
The problem is that I want to play .au files which have  different sampling
frequencies, nos of channels, etc (this is going to support Mosiac so it
could get anything - hopefully most people who put up pages use .au format
for any bits of sound).  I have got the Sox 7 utility from Sunsite and the
vplay utility from the snd-util package.  The only way I can reliably play
.au files is to do the following pipe:

sox -t au - -t ub -r 44000 - | vplay -s 44000
(The o/p from Mosaic is piped to this)

Apart from being a terrible kludge, the conversion adds noise to 8kHz
samples.  I have read the sox7.readme file, creating the sym-link from
/dev/dsp.sbdsp to /dev/dsp and then using sox <filename> /dev/dsp.sbdsp
appears to play files sampled at 22050kHz back at 44kHz.

        Am I just being stupid and there's a really easy way to do it?

        Oh, I'm running a 0.99pl15b kernel with a Sound Blaster 16.  Every
thing else woks wonderfully, vplay will play wavs, etc with no problem, I
just can't play non 8000 Hz .au files!

        Thanks in advance for your help,

                Dale.

--
******************************************************************************
*  Dale Shuttleworth                                                         *
*  Dept of Elec Eng,  Brunel University, Uxbridge, UB8 3PH, UK               *

******************************************************************************

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