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multimon-ng is the successor of multimon. It decodes the following digital transmission modes:

  • POCSAG512 POCSAG1200 POCSAG2400
  • FLEX
  • EAS
  • UFSK1200 CLIPFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3
  • HAPN4800
  • FSK9600
  • DTMF
  • ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI
  • EEA EIA CCIR
  • MORSE CW
  • X10

multimon-ng can be built using either qmake or CMake:

mkdir build
cd build
qmake ../multimon-ng.pro
make
sudo make install
mkdir build
cd build
cmake ..
make
sudo make install

The installation prefix can be set by passing a 'PREFIX' parameter to qmake. e.g: qmake multimon-ng.pro PREFIX=/usr/local

So far multimon-ng has been successfully built on Arch Linux, Debian, Gentoo, Kali Linux, Ubuntu, OS X, Windows and FreeBSD. (On Windows using the Qt-MinGW build environment, as well as Cygwin and VisualStudio/MSVC)

Files can be easily converted into multimon-ng's native raw format using sox. e.g: sox -t wav pocsag_short.wav -esigned-integer -b16 -r 22050 -t raw pocsag_short.raw GNURadio can also generate the format using the file sink in input mode short.

You can also "pipe" raw samples into multimon-ng using something like sox -t wav pocsag_short.wav -esigned-integer -b16 -r 22050 -t raw - | ./multimon-ng - (note the trailing dash)

As a last example, here is how you can use it in combination with RTL-SDR: rtl_fm -f 403600000 -s 22050 | multimon-ng -t raw -a FMSFSK -a AFSK1200 /dev/stdin

Packaging

qmake multimon-ng.pro PREFIX=/usr/local
make
make install INSTALL_ROOT=/