Fldigi uses your computer's sound card to generate and decode digital signals.

Flmsg talks to Fldigi to send and receive messages.

All work is done by your computer, don't need an external Terminal Node Controller.

Audio from your computer speakers go into your radio's mike input for transmission.

Audio from your radio goes into your computer's mike or line-in for decoding.

Don't need an extremely powerful new computer, older machines work just fine.

Our strength is the ability to turn fun activities into powerful emcomm tools.

If you're ready for your daily hamming, you will be more prepared for emergencies.

Be active, and on the day you're needed, you'll feel right at home.
FLDIGI
What is Fldigi?

Fldigi is a computer program intended for Amateur Radio Digital Modes operation using a PC (Personal Computer). Fldigi operates (as does most similar software) in conjunction with a conventional HF SSB radio transceiver, and uses the PC sound card as the main means of input from the radio, and output to the radio. These are audio-frequency signals. The software also controls the radio by means of another connection, typically a serial port.

Fldigi is multi-mode, which means that it is able to operate many popular digital modes without switching programs, so you only have one program to learn. Fldigi includes all the popular modes, such as DominoEX, MFSK16, PSK31, and RTTY.

Unusually, Fldigi is available for multiple computer operating systems; FreeBSD™; Linux™, OS X™ and Windows™.