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SoftFM - Software decoder for FM broadcast radio with RTL-SDR --------------------------------------------------------------- SoftFM is a software-defined radio receiver for FM broadcast radio. It is written in C++ and uses RTL-SDR to interface with RTL2832-based hardware. This program is mostly an experiment rather than a useful tool. The purposes of SoftFM are * experimenting with digital signal processing and software radio; * investigating the stability of the 19 kHz pilot; * doing the above while listening to my favorite radio station. Having said that, SoftFM actually produces pretty good stereo sound when receiving a strong radio station. Weak stations are noisy, but SoftFM gets much better results than rtl_fm (bundled with RTL-SDR) and the few GNURadio-based FM receivers I have seen. SoftFM provides: * mono or stereo decoding of FM broadcasting stations * real-time playback to soundcard or dumping to file * command-line interface (no GUI, no visualization, nothing fancy) SoftFM requires: * Linux * C++11 * RTL-SDR library (http://sdr.osmocom.org/trac/wiki/rtl-sdr) * supported DVB-T receiver * medium-fast computer (SoftFM takes 25% CPU time on my 1.6 GHz Core i3) * medium-strong FM radio signal For the latest version, see https://github.com/jorisvr/SoftFM Installing ---------- The Osmocom RTL-SDR library must be installed before you can build SoftFM. See http://sdr.osmocom.org/trac/wiki/rtl-sdr for more information. SoftFM has been tested successfully with RTL-SDR 0.5.3. To install SoftFM, download and unpack the source code and go to the top level directory. Then do like this: $ mkdir build $ cd build $ cmake .. # CMake tries to find librtlsdr. If this fails, you need to specify # the location of the library in one the following ways: # # $ cmake .. -DCMAKE_INSTALL_PREFIX=/path/rtlsdr # $ cmake .. -DRTLSDR_INCLUDE_DIR=/path/rtlsdr/include -DRTLSDR_LIBRARY_PATH=/path/rtlsdr/lib/librtlsdr.a # $ PKG_CONFIG_PATH=/path/rtlsdr/lib/pkgconfig cmake .. $ make $ ./softfm -f <radio-frequency-in-Hz> # ( enjoy music ) License ------- SoftFM, copyright (C) 2013, Joris van Rantwijk This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see http://www.gnu.org/licenses/gpl-2.0.html --
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Software decoder for FM broadcast radio with RTL-SDR
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