In Funk Amateur and Elektuur (Elektor) I read several articles about DRM, digital radio on the HF bands. That interested me and I decided to build a simple DRM receiver and found the required software (Dream) on the Internet.
By the way: with every DC receiver, you can receive DRM signals and decode them using the Dream software, just try it. You only have to tune your receiver about 12 KHz above or below the transmitting frequency. The transmitting frequencies are available in the Dream software and are updatable via the Internet.
Here some photographs. Because of the decreasing interest in DRM, I did not continuing this project.
DRM Receiver
Screenshot DRM signal
