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Building FreeDV GUI

This document describes how to build the FreeDV GUI program for various operating systems. FreeDV GUI is developed on Ubuntu Linux, and then cross compiled for Windows using Fedora Linux (Fedora has great cross compiling support) and Docker.

Further Reading

Building on Ubuntu Linux (16-20)

$ sudo apt install libspeexdsp-dev libsamplerate0-dev sox git \
libwxgtk3.0-gtk3-dev portaudio19-dev libhamlib-dev libasound2-dev libao-dev \
libgsm1-dev libsndfile-dev cmake module-assistant build-essential
$ git clone
$ cd freedv-gui
$ ./

(For Ubuntu 20.04 the wxWidgets package is named libwxgtk3.0-gtk3-dev.)

Then run with:

$ ./build_linux/src/freedv

Note this builds all libraries locally, nothing is installed on your machine. make install is not required.

Building on Fedora Linux

$ sudo dnf groupinstall "Development Tools"
$ sudo dnf install cmake wxGTK3-devel portaudio-devel libsamplerate-devel \
  libsndfile-devel speexdsp-devel hamlib-devel alsa-lib-devel libao-devel \
$ git clone
$ cd freedv-gui
$ ./

Then run with:

$ ./build_linux/src/freedv

Installing on Linux

You need to install the codec2 and lpcnetfreedv shared libraries, and freedv-gui:

$ cd ~/freedv-gui/codec2/build_linux
$ sudo make install
$ cd ~/freedv-gui/LPCNet/build_linux
$ sudo make install
$ cd ~/freedv-gui/build_linux
$ sudo make install
$ sudo ldconfig

Generating Debian packages

To generate a Debian/Ubuntu package, simply run the "cpack" command after running "make". The resulting .deb file can then be installed by running "dpkg -i" (once Codec2 and LPCNet packages are also installed).


The wav directory contains test files of modulated audio that you can use to test FreeDV (see the USER_MANUAL).

Building for Windows using Docker

The Windows build process has been automated using a Docker container, see the freedv-gui Docker README.

Building for Windows on Fedora (Cross compiling)

Install basic MinGW development packages:

  $ sudo dnf install mingw{32,64}-filesystem mingw{32,64}-binutils \
    mingw{32,64}-gcc mingw{32,64}-crt mingw{32,64}-headers mingw32-nsis

Install dependencies of FreeDV/Codec2:

  $ sudo dnf install mingw{32,64}-speex

Enable Freetel specific packages not currently in Fedora proper:

  $ sudo dnf install dnf-plugins-core
  $ sudo dnf copr enable hobbes1069/mingw
  $ sudo dnf install mingw{32,64}-wxWidgets3 mingw{32,64}-hamlib \
    mingw{32,64}-portaudio mingw{32,64}-libsndfile mingw{32,64}-libsamplerate.noarch

Clone freedv-gui:

  $ cd
  $ git clone

Building FreeDV for 64 Bit windows:

  $ cd ~/freedv-gui
  $ ./
  $ cd build_win64
  $ make package

OR Building FreeDV for 32 Bit windows:

  $ cd ~/freedv-gui
  $ CMAKE=mingw32-cmake ./
  $ cd build_win32
  $ make package

Testing Windows Build

Conveniently, it is possible to run Windows executables using Wine on Fedora:

Testing LPCNet:

  $ cd ~/freedv-gui/LPCNet/build_win/src
  $ WINEPATH=$HOME/freedv-gui/codec2/build_win/src';'$HOME/freedv-gui/build_win/_CPack_Packages/win64/NSIS/FreeDV-1.4.0-devel-win64/bin/ wine lpcnet_enc.exe --infile all.wav --outfile all.bit
  $ WINEPATH=$HOME/freedv-gui/codec2/build_win/src';'$HOME/freedv-gui/build_win/_CPack_Packages/win64/NSIS/FreeDV-1.4.0-devel-win64/bin/ wine lpcnet_dec.exe --infile all.bin --outfile all_out.raw
  $ cat all_out.raw | aplay -f S16_LE -r 16000

Testing FreeDV API:

  $ cd freedv-gui/codec2/build_win/src
  $ WINEPATH=$HOME/freedv-gui/LPCNet/build_win/src';'$HOME/freedv-gui/build_win/_CPack_Packages/win64/NSIS/FreeDV-1.4.0-devel-win64/bin/ wine freedv_rx 2020 ~/freedv-gui/wav/all_2020.wav out.raw
  $ play -t .s16 -r 16000 -b 16 out.raw

Building and installing on OSX

Please see README.osx.

Building and installing on FreeBSD

In change the build_linux directory to build_freebsd.


GUI Application for FreeDV – open source digital voice for HF radio




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