And one very important point for Tony in Darwin and all other Macophiles - this program is also Mac Friendly.
It's getting very favourable reviews from the hardened members of the ABC Users Group who seem to be very committed Mac and Linux users.
While I won't have a chance to try it out for a while the program has a built in Wave File recorder which then allows you to mark the spot(S) with the unknown chord and it displays the notes via a visual spike on a piano keyboard graphic. You then pick up your favourite instrument and keep adding the progressively less prominent notes as displayed until you reach the right sound or you run out of fingers.
I would warn others though - I've spent time in the past looking for chord exotica to fit a particular song only to find that I'd overlooked something as simple as (say) A Minor. It can be a bit deflating! On the other hand it may help to solve friendly disputes over 'what chord is he/she playing on this track?'.
Regards, John