[lug] Capturing a data stream

[Michael D. Hirsch]

On Wednesday 08 October 2003 11:46 pm, Ed Meyer wrote:
> Hey everybody,
>
> Its been a while since I've had to post a question - but that doesn't mean
> I haven't learned a lot from lurking on this list.  My current dilemma has
> me quite stumped but since everything is possible in Linux I'm sure I'm
> just looking easily through the answer.
>
> Is there a way to capture a stream of data as its heading to a device to
> divert it?  In particular - I'm working for a company which makes products
> for the broadcast (radio) market and we want to be able to capture the data
> stream heading for the audio card and divert it for analysis / debugging /
> monitoring.  

I'm pretty certain that if you use the alsa sound driver there are some built 
in hooks to capture the sound as it leaves the driver.  I also know that if 
you buy the commercial OSS compatible drivers from 4-front they offer this 
capability.

Last I heard 4front was getting out of the sound driver business, though.  
They are the guys who first wrote the Linux sound drivers who then went pro.

Michael