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Date: Tue, 18 Mar 2014 17:49:48 -0700 (PDT)
From: PolarStorm <developer@clinicsearch.com>
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Subject: Re: sox - package is broken
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David Stacey wrote
> I was testing with
>      cat ding.wav > /dev/dsp
> This gives a segmentation fault with the latest (2014-03-18) snapshot; 
> no sound is heard However, if I repeat your test:
>      cp ding.wav /dev/dsp
> Then that works and the ding dings. Which confuses me greatly - I've 
> been using *nix for nearly 20 years, and I honestly would have said that 
> the two lines above were synonymous - they're obviously not!

Two things I can think of:

1) With "cat" the output file is created/handled by the shell, whereas "cp"
is doing its own file creation. You should see what's going on by:
   strace cat ding.wav > /dev/dsp
   strace cp ding.wav /dev/dsp

2) Cat is trying to expand sparse files and perhaps it thinks of your
ding.wav as containing sparse data?

Also, I would guess, that the dsp driver should handle bit streamed input
differently than a block copy/dump? 


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