Description:
Ham radio digital modem application
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Type: Cask
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Latest Version: 4.2.11@0
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Tracked Since: Dec 17, 2025
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Links:
Homepage |
formulae.brew.sh
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Category: Networking
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Tags:
ham-radio
digital-modes
modem
amateur-radio
communication
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Install:
brew install --cask fldigi
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About:
FLdigi is a cross-platform software modem application for amateur radio operators. It enables computers to transmit and receive digital signals over radio, supporting a wide array of modulation modes including PSK31, RTTY, and Olivia. This tool is essential for keyboard-to-keyboard chat, data transmission, and weak signal communication.
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Key Features:
- Supports over 100 digital modes including PSK31, RTTY, and Olivia
- Integrated rig control for transceiver frequency synchronization
- Built-in macros for automated message transmission
- Audio spectrum analysis and waterfall display
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Use Cases:
- Keyboard-to-keyboard text communication over HF radio
- Transmitting and receiving weather data or bulletins
- Emergency communication when voice channels are unavailable
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Alternatives:
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WSJT-X
– Specialized for weak-signal modes like FT8 and JT65, whereas FLdigi offers a broader range of traditional modes.
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CQRLOG
– Primarily a logging application, not a direct modem replacement.
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| Detected |
Version |
Rev |
Change |
Commit |
| May 12, 2026 12:21pm |
4.2.11 |
0 |
VERSION_BUMP |
263abb26 |
| Dec 18, 2025 4:20am |
4.2.10 |
0 |
VERSION_BUMP |
44a5f698 |
| Sep 15, 2025 11:39am |
4.2.09 |
0 |
VERSION_BUMP |
510829a4 |
| Sep 8, 2025 7:52pm |
4.2.09 |
0 |
VERSION_BUMP |
858643af |
| Jan 16, 2024 11:53pm |
4.2.04 |
0 |
VERSION_BUMP |
e09d9fd6 |
| Nov 2, 2023 10:26am |
4.2.03 |
0 |
VERSION_BUMP |
f2df3bf4 |
| Nov 1, 2023 7:13pm |
4.2.03 |
0 |
VERSION_BUMP |
946b7b23 |
| Oct 31, 2023 9:44am |
4.2.02 |
0 |
VERSION_BUMP |
a4e5253f |
| Sep 2, 2023 7:57pm |
4.2.00 |
0 |
VERSION_BUMP |
d18420f3 |
| Mar 19, 2023 5:19am |
4.1.26 |
0 |
VERSION_BUMP |
6b0b5d72 |
| Mar 14, 2023 9:27pm |
4.1.26 |
0 |
VERSION_BUMP |
91ccc929 |
| Feb 19, 2023 12:58pm |
4.1.25 |
0 |
VERSION_BUMP |
8a41398b |
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