Finally Digital Voice has arrived in software form , There are some hardware modem thats can be used with Digital voice as well but, at the present time they are fairly expensive. D-Star is another hardware system coming into the amateur radio scene and is only in a few selected areas in the U.S. right now, the only other alternative is using Software for Digital voice.I hope some more authors will experiment more into this mode in the future with more funcitions and capabilities. You will receive nothing or you will receive a full qieting signal with only the station you are listening to with no galactic noise in the modulated signal. This mode is fairly sensitive when compared to analog SSB but ionspheric effects can make some drop outs.
FFT Window Screenshot