It is a transmitter software that broadcasts a digital radio channel conforming to the DAB/DAB+ standard. The system encodes and multiplexes the audio signal, modulates it using SDR technology and broadcasts it. CSP focused specifically on integrating a number of software modules for multiplexing and modulation developed in the context of the opensource mmbTools project by the Communications Research Centre, Canada, and in terms of AAC (as per the DAB+ standard) integrating the FDK AAC libraries developed in the Fraunhofer research centre in Germany.