[ale] Record audio when there is audio

[lists at serioustechnology.com (Geoffrey)]

Chris Fowler wrote:
> On Thu, 2009-04-23 at 18:39 -0400, Jerald Sheets wrote:
>> knowing you like I do, I'm going to ask for elaboration on the "when
>> there's audio to record" part.  :)
>>
> 
> I want to record the audio from the ARC repeater.  This repeater is
> quiet most of the day so I don't want to waste disk space.  Some issues
> have been reported and I want to try and find them but can't listen 24x7
> because I work and sleep.

In other words:

if (something to record) {
	record it
}

Where 'something to record' is a blocking process that is smart enough 
to watch the device and know when there is something to record, 
instantaneously.

-- 
Until later, Geoffrey

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety.
  - Benjamin Franklin