The gqrx tool is an open source Software-Defined Radio (SDR) receiver powered by the GNU radio and the Qt graphical toolkit.

It has the following features:

• Discovers devices connected to a computer
• Processes I/Q data
• AM, SSB, CW, FM-N, and FM-W (mono and stereo) demodulators
• Records and plays back audio to/from the WAV file
• Records and plays back raw baseband data
• Streams audio output over UDP

In this recipe, we will cover the basics of gqrx.