Simply listen to an FM broadcast station using RTL-SDR

Building on my previous post of listening to radio by re-streaming it as a compressed stream, here is a simpler way of encoding the audio straight to your computer’s speakers” You’ll need to install ‘RTL-SDR’ (as before) and also ‘sox’. From Ubuntu and similar linux distros, the command is: sudo apt-get install sox For Apple […]


VLC setting to test audio stream

Using RTL_FM and FFMPEG to stream radio audio over network

I’ve been playing with a great command-line software-defined radio command called RTL_FM (part of RTL-SDR) and used it with FFMPEG to create a 128Kbps MP3 stream of the radio signal I am receiving. On my Mac (OSX) I use MacPorts to install rtl-sdr and ffmpeg. On Linux your normal package installer such as apt should […]


Radio signals are beautiful: DAB Radio

Earlier in this blog I’ve shown you an FM signal, so now it’s time to show you the newer digital equivalent! Digital Audio Broadcasting (DAB) is becoming popular in the UK, and most modern radio sets sold have DAB reception capability. DAB offers a greater choice of radio stations than available through the FM or […]

BBC-National-DAB-ensemble

PMR446 analogue and digital signals

Comparison of Analogue (NFM) and Digital (FDMA) Signals in PMR446 band

In the UK and other European Union countries, a set of radio channels have been allocated for use by the general public licence-free. Known as PMR446 (Public Mobile Radio on 446 MHz), a set of 8 analogue narrowband FM channels and 16 digital narrowband FDMA (Frequency Division Multiple Access) channels are available. Popular amongst hikers, […]


Radio Signals Are Beautiful: SDR and FM

As a radio ham I have recently become interested in a new branch of the hobby called Software Defined Radio (SDR). SDR is a radio system where the classic components of a radio receiver or transmitter has been replaced by a computer program, It’s only in recent times that domestic computers have become powerful enough […]

USB SDR radio receiver