FreeDV allows any SSB radio to be used for low bit rate digital voice.
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11.3 MB
Free
FreeDV is a GUI application for Mac that allows any SSB radio to be used for low bit rate digital voice.
Speech is compressed down to 1600 bits then modulated onto a 1.25 kHz wide 16QPSK signal which is sent to the Mic input of a SSB radio. On receive, the signal is received by the SSB radio, then demodulated and decoded by FreeDV.
DOWNLOAD
11.3 MB
Free