Listener records immediatly upon launch

["Paulo Costa" <paulocosta@uniarde.pt>]

Hello everyone;

First, I'd like to thank Mr Folkert van Heusden for coding this software and 
sharing it with everyone.

I installed and modified the "listener.conf" file to what I think to be my 
needs but it's not working quite as I expected.
Relevant items of the conf file:

   detect_level = 700
   min_duration = 10
   rec_silence = 10
   max_duration = 900
   min_triggers = 11025
   amplify = off

If I understood it correclty, with this conf, whenever the mic input is 
raised above this level (700 - which I picked with setlistener) for a 
quarter of a second (11025 for my chosen rate of 44100) listener will start 
recording a file which will be no shorter than 10 seconds nor longer than 15 
minutes and will stop recording if sound capture falls under the threshold 
(700) for 10 seconds.

I've muted every output of the soundcard to prevent loops and other stuff 
which could interfere with the detection process, but as soon as I launch 
listener it starts recording a string of 12 second files ( min_duration + 
default 2secs backrecord ). I'm using an el cheapo fortemedia fm-801 PCI 
sound card and was wondering if this could be due to bad hardware or 
something...

Thank you in advance for any help

Best regards
Paulo