Using JMPX to encode audio for FM transmission
One very interesting use case for a 192kHz capable sound card is FM transmission. As a FM transmitter is basically a mono device, it needs some tricks to encode stereo audio. If you also want to integrate data transmissions as you are used from RDS tuners, it gets even more complicated. Luckily, you don’t have to do anything of this by yourself. There are already software tools available and the HiFiBerry user Jonti Olds has written a very nice guide how to implement this on a Raspberry Pi. It is published here with his permission. You can find the original on his Github project page.