This paragraph here summarizies what Cubehub has done differently.
Currently this fork only exists because it seems that multimon-ng is quite picky about fsk9600 symbol rate. There is slight error in demod if input stream is converted to 22050 sps output stream. With this little error multimon-ng was unable to decode fsk9600 stream.
Anyway branch 48k-demod-fsk96 adds 48000 sps input stream support to fsk9600.
sudo apt-get install libpulse-dev git clone https://github.com/cubehub/multimon-ng.git cd multimon-ng git checkout 48k-demod-fsk96 mkdir build cd build qmake ../multimon-ng.pro make sudo make install
It is a fork of multimon. It decodes the following digital transmission modes:
- POCSAG512 POCSAG1200 POCSAG2400
- UFSK1200 CLIPFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3
- ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI
- EEA EIA CCIR
- MORSE CW
The following changes have been made so far:
- Fixes for x64
- Basic functionality on Mac OS X 'Lion' (Soundcard/OSS input is unsupported)
DUMMY_AUDIO"backend" (Gets rid of the OSS dependency, breaks audio in doing so)
ONLY_RAWdisables the format conversion while getting rid of posix dependencies
NO_X11to disable the X11 dependency since Apple will drop Xorg soon
- Override mode for POCSAG decoding (e.g. force text decoding)
- Brute-Force BCH implementation for POCSAG forward error correction
- Verbose mode is now listed in
- Continued EAS/SAME development. The decoder now works, but it should be considered "alpha" quality. Do not rely on it for the reception of emergency alerts!
- Portability is a major goal
- Compiles on Windows (MinGW or Cygwin) without format conversion
- PulseAudio support, contributed by inf_l00p_
- Windows native audio and a VisualStudio/MSVC project file, contributed by bzzt_ploink
- Now accepts raw samples as piped input
mkdir build cd build qmake ../multimon-ng.pro make sudo make install
mkdir build cd build cmake ../ make make install
How to convert files to multimon-ng format [1 channel, signed 16 bit integer, 22050 sps]
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
You can also "pipe" raw samples into multimon-ng using something like this
sox -t wav pocsag_short.wav -esigned-integer -b16 -r 22050 -t raw - | ./multimon-ng -
(note the trailing dash)