"Mike Gilmour" wrote in message
. ..
Sounds sorta like a large transient 'pulse' incoming from maybe local
switching thats putting an overly large signal onto your recording thats
depressing an autogain control circuit - the waveform coming up in 1/4 sec
is the recovery time. Thats guessing mind....


Ok, I'll buy that - presumably the 'autogain control circuit' is in the mic,
Mike? (New component, new phenomenon....) But why/how is the waveform pulled
down from the 'centreline' or is that just a 'software thing'?

Here's another one.....

http://www.apah69.dsl.pipex.com/keit...ow/glitch2.jpg

......slightly different but showing the same general behaviour. The
waveform, while having been pulled down as before, appears to show no
reduction in gain (ie height of waveform).....

Or am I just reading this all wrong?

It's no biggie and has only happened a few times, but not being able to
'repair' it does mean that the recording (live joanna) has to be done again.
If it's the boiler (likely) the simplest remedy is prevention - like
switching it off, but my curiosity is what's happening with the waveform!