Make has covered it before: http://makezine.com/2012/12/10/raspberry-pi-as-an-fm-transmitter/?parent=Electronics http://makezine.com/2012/12/10/raspberry-pi-as-

Make has covered it before: http://makezine.com/2012/12/10/raspberry-pi-as-an-fm-transmitter/?parent=Electronics http://makezine.com/2012/12/10/raspberry-pi-as-an-fm-transmi... Note that the news here is only the Make project on it, as this has been known and working for well over a year. The current PiFM software uses DMA from the userspace to play without clicks and without taking the whole CPU. The later versions also appear to support stereo, so I can't make much sense of this sentence in Make's tutorial (step 5): > Each file is then re-encoded into a mono format the PiFM radio can handle. If their pre-configured image is really doing this, it is doing it wrong, I think. Worth noting that the PiFM script is capable of reading from stdout, and not just play WAV files, so the possibilities go well beyond playing music off a SD card. By the way, here is the original page in a Wiki (of which Make shows a screenshot, but I found no link): http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspb... edits: add information