Fldigi is a modem program for most of the digital modes used by radio amateurs today: CW, PSK, MFSK, RTTY, Hell, DominoEX, Olivia, and Throb are all supported. It can help calibrate a sound card to a time signal and do frequency measurement tests.

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Categories

Ham Radio

License

GNU General Public License version 3.0 (GPLv3)

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User Ratings

★★★★★
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ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5

User Reviews

  • Love this project! The current version (14.1.16) will not work Mac OS X Big Sur (11.0.1), but the beta version (4.1.16.02) seems to work ok. Thanks to the team for addressing this issue so quickly!
  • The responsiveness of the Dev Team via groups.io is superior.
  • Thank you for a great piece of software, and for the support.
  • FLDigi does everything I need for the non-WSJT-X modes. The author is very responsive to bug reports and feature enhancements. Design-wise had to drop it 1 star mainly because the complexity makes the software a little difficult to use/understand and as such the 600+ page manual makes for daunting reading. Mike
  • UI is counter-intuitive; the amount of show stopper bugs is huge for a mature piece of software like this. Crashes if a wrong button is pressed.
    1 user found this review helpful.
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Additional Project Details

Operating Systems

Linux, BSD, Mac, Windows

Languages

French, Polish, Italian, German, Spanish

Intended Audience

End Users/Desktop

User Interface

X Window System (X11), Win32 (MS Windows), Cocoa (MacOS X), FLTK

Programming Language

C++, C

Registered

2011-09-30