this is a c&p from freedv(dot)org
FreeDV is a GUI application for Windows and Linux (MacOS and BSD are in testing) that allows any SSB radio to be used for low bit rate digital voice.
Speech is compressed down to 1400 bit/s then modulated onto a 1100 Hz wide QPSK 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.
FreeDV was built by an international team of Radio Amateurs working together on coding, design, user interface and testing. FreeDV is open source software, released under the GNU Public License version 2.1. The FDMDV modem and Codec 2 Speech codec used in FreeDV are also open source.
Useful frequencys : 28.720, 24.993, 21.313, 18.119, 14.240, 14.236, 7.190, 7.177, 5.4035, 3.817, 3.732, 1.997
{http://qso.k7ve.org/} FreeDV QSO Finder is a site for locating QSO's
it is pretty interesting, i have been listening and have heard a few QSO's but haven't made any my self yet..
FreeDV is a GUI application for Windows and Linux (MacOS and BSD are in testing) that allows any SSB radio to be used for low bit rate digital voice.
Speech is compressed down to 1400 bit/s then modulated onto a 1100 Hz wide QPSK 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.
FreeDV was built by an international team of Radio Amateurs working together on coding, design, user interface and testing. FreeDV is open source software, released under the GNU Public License version 2.1. The FDMDV modem and Codec 2 Speech codec used in FreeDV are also open source.
Useful frequencys : 28.720, 24.993, 21.313, 18.119, 14.240, 14.236, 7.190, 7.177, 5.4035, 3.817, 3.732, 1.997
{http://qso.k7ve.org/} FreeDV QSO Finder is a site for locating QSO's
it is pretty interesting, i have been listening and have heard a few QSO's but haven't made any my self yet..
