Friday 14 November 2014

How to record radio signals



How to record music from local radio stations


Radio is an old invention and local radio stations is what people usually listen to even today. Also called FM radio, which stands for frequency modulation radio, as it is a way radio transmitters send signal into the air. Your radio transistor has to have antenna to receive such radio signal, however the radio signal can't reach you anywhere as it weakens with distance, and if you're in a tunnel or behind the hill that is wider than the radio wavelength, your radio won't play.

You usually get strong enough signal from a local radio station, that is a station that has antenna in your town. In this example we will learn how to record music from local radio station as explained in the previous article. All you need is a radio receiver, like this one in the picture, connect it to your computer (phones output to computer line-in) and record it with Audacity via stereo mix.



How to record music from worldwide radio stations


There are dedicated antennas placed around the world that will capture their local radio signals and send it to internet. Not only radio stations, but any radio signals, from all ranges, from radio amateurs, walkie-talkies, extraterrestrial signals, atmospheric noise, etc...

To record music from radio stations around the world, you have to tune in into station and you can record it the same way as explained before. Next two pictures show WebSDR services from Australia and Slovenia. SDR stands for software defined radio receiver.


 (to enlarge the picture right click and click View picture)

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