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Gqrx is an experimental software defined radio receiver implemented using GNU Radio and the Qt GUI toolkit. Currently it works on Linux and Mac and supports the following devices:

  • Funcube Dongle Pro and Pro+
  • RTL2832U-based DVB-T dongles (rtlsdr via USB and TCP)
  • OsmoSDR
  • USRP
  • HackRF Jawbreaker
  • Nuand bladeRF
  • any other device supported by the gr-osmosdr library

Gqrx can operate as a traditional AM/FM/SSB receiver with audio output or as an FFT-only instrument.


Gqrx is distributed as source code package and binaries for Linux and Mac. Please see for a list of official and third party download resources.


The first time you start gqrx it will open a device configuration dialog. Supported devices that are connected to the computer are discovered automatically and you can select any of them in the drop-down list.

If you don't see your device listed in the drop-down list it could be because:

  • The driver has not included in a binary distribution
  • The udev rule has not been properly configured

You can test your device first with rtl_test, qthid, or uhd_usrp_probe that come with the respective packages.

Gqrx supports multiple configurations and sessions if you have several devices or if you want to use the same device under different configurations. You can load a configuration from the GUI or using the -c command line argument. See "gqrx --help" for a complete list of command line arguments.

Known problems

See the bug tracker on Github:

Getting help and reporting bugs

There is now a Google group for discussing anything related to Gqrx:!forum/gqrx This includes getting help with installation and troubleshooting. Please remember to provide detailed description of your problem, your setup, what steps you followed, etc.

Installation from source

The source code is hosted on Github:

To compile gqrx from source you need the following dependencies:

Gqrx comes with a simple qmake build setup. It can be compiled from within Qt Creator or in a terminal:

$ git clone gqrx.git
$ cd gqrx.git
$ mkdir build
$ cd build
$ qmake ..
$ make

To build in debug mode add "CONFIG+=debug" to the qmake step above. There are also some other qmake options, see the file.

Credits and License

Gqrx is designed and written by Alexandru Csete OZ9AEC, and it is licensed under the GNU General Public License. Some of the source files were adopted from Cutesdr by Moe Weatley and these come with a BSD license. Following people and organisations have contributed:

Alex Grinkov:

  • FM stereo demodulator.

Anthony Willard:

  • Various fixes and improvements

Elias Önal:

  • Building Gqrx on Mac OS X.
  • Crash recovery dialog.

Frank Brickle, AB2KT: Bob McGwier, N4HY:

  • Noise blanker (from dttsp).

Göran Weinholt, SM6-8239:

  • Various GUI improvements.

Jiří Pinkava:

  • Port to gnuradio 3.7 API

Moe Weatley:

  • FFT plotter and waterfall.
  • Frequency selector.
  • Signal strength indicator.
  • AGC

Nadeem Hasan:

  • Bug fixes.


  • QtColorPicker widget.

Vesa Solonen:

  • DC removal in AM demodulator.

Vincent Pelletier

  • Initial work on the horizontal zooming / scrolling.

Also thanks to Volker Schroer and Alexey Bazhin for bringing Funcube Dongle Pro+ support to GNU Radio and Gqrx.

Some of the icons are from the GNOME and Tango icon themes. The scope.svg icon is based on the utilities-system-monitor.svg icon from the Mint-X icon theme licensed under GNU GPL.

Let me know if somebody or someting is missing from the list!