Here's a few sounds to give you an idea of how we do things. They are all recorded live (no super-polished studio stuff for us, oh no! :) )

MP3 file,
42 secs playing time
293 kb 
(Warning: It's a bit loud!)

MP3 File
25 secs playing time
298kb

MP3 File; Tune plus Tony calling
5 Mins playing time,
Large file: 3 Mb