On Mon, Jun 21, 2004 at 11:11:09AM -0400, Brian J. Murrell wrote:
> On Mon, 2004-06-21 at 10:28 -0400, Richard Ellis wrote:
> 
> > Check your disk I/O read bandwidth.  Lav2wav is heavily read I/O
> > bandwidth bound. ...
> 
> /dev/hda:
>  Timing buffer-cache reads:   636 MB in  2.00 seconds = 318.00 MB/sec
>  Timing buffered disk reads:  124 MB in  3.02 seconds =  41.06 MB/sec

That should be more than enough, as long as you've not got something
in the background consuming 40.06MB/sec of read bandwidth, or
something else writing loads of data to disk at the same time.

> Thots?

Your original command line was writing the sox output to /dev/null. 
That shouldn't be a time consumer, but as a quick check, switch to
writing to a read file on disk instead.  Does that change anything?

Also, you might want to try running a buffer between the two
processes, that might help as well.  That would let lav2wav run ahead
of sox instead of having to stop each time the pipeline buffer gets
full.



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