Dear Bill I was thinking about 1200bps packet and my idea was to generate APRS or Cluster packets.
Anyway it is possible to transmit audio files containing packet radio baseband tones at any data rate, that is to say also 9600. A good implementation could be writing down a software that generates the audio file starting from the information to be transmitted. Then it's enough to tx the file via nbfm.out.
73s
Ale