This has come up a few times. I found this discussion on another site which can come in handy for international users of the OBi looking for a method to determine the frequencies and cadence of tones which are used in their country of origin.
http://voiceguide.com/forums/index.php?showtopic=599
Use Audacity http://audacity.sourceforge.net/ to find out the frequencies and cadence.
Cool stuff QBZ. I've been using Audacity but had no idea it could be helpful in this scenario. Looks like posts #20 through #26 of that thread have the good stuff.
Nice tip! :)
pc44