RadI0

A .NET 10 Software-Defined Radio (SDR) receiver for DAB+ and FM broadcasts

Software Requirements

.NET Runtime: .NET 10 or later (Linux & Windows)
rtl-sdr - RTL-SDR driver library
faad2 - AAC audio decoder library
libVLC library for audio playback

Hardware Requirements

RTL-SDR Dongle: RTL2832U-based USB receiver (e.g. RTL-SDR Blog V3, NooElec NESDR, ASTROMETA)
Antenna: Standard telescopic or dipole antenna (FM 88-108 MHz, DAB+ 174-240 MHz)
USB Port: Available USB port for connecting RTL-SDR dongle

Download Latest Release (v0.1.4.1)

Linux

Linux x64 (.tar.xz) Linux arm64 / Raspberry Pi Linux arm

Windows

Windows x64 (.7z) Windows arm64 (.7z) Windows x86 (.7z)

View Project on GitHub

Key Features

DAB+ Radio

OFDM Demodulator (Fast Fourier Transform)
Viterbi convolution decoding & Reed–Solomon forward error correction
FIC channel data parsing & ADTS stream demodulation
AAC recording & PCM recording (faad2)
UDP streaming support (ADTS AAC for DAB+)
Service number-based tuning
PAD dynamic label parsing (DLS)
MOT slideshow (images saved automatically to pictures/RadI0)

FM Radio

Mono / Stereo FM demodulation
PCM WAVE recording
RDS RadioText parsing

UI & Platform

Terminal-based GUI built with Terminal.GUI
Cross-platform: Linux & Windows support
Audio playback via libVLC
Real-time spectrum analyzer, constellation diagram & 10-band equalizer

Remote Access (rtl_tcp)

RadI0 supports remote signal processing by connecting to an rtl_tcp instance. Set up your RTL-SDR dongle and antenna in a location with optimal reception and run the RadI0 receiver interface on a different machine anywhere in the network.

High Bandwidth Notice: Because raw I/Q samples are transferred, DAB+ throughput is ~30 Mbit/s. Ensure sufficient network bandwidth.

Android Support

The NuGet packages used by RadI0 are also used in DVBT Televizor. Through this actively developed application, you can also listen to digital radio directly on Android devices.

Screenshots & Architecture

Console Commands Reference

DAB+ Commands

Command Line	Description
`./RadI0 -dab -f 8D`	Tune 8D frequency
`./RadI0 -dab -f 8C -sn "1175"`	Tune 8C frequency and play radio corresponding to service number 1175
`./RadI0 -dab -f 8C -sn "1175" -wave /tmp/radio.wave`	Tune 8C frequency, play service 1175, and save audio to PCM wave
`./RadI0 -f 8C -sn 1175 -udp 127.0.0.1:8020`	Stream DAB audio to UDP (ADTS aac, playable by VLC or mplayer)
`./RadI0 -f 7C -sn 3889 -aac MyDABRadioRecord.aac`	Export DAB audio to AAC file

FM Commands

Command Line	Description
`./RadI0 -fm -f "104 MHz"`	Tune and play 104 MHz FM station
`./RadI0 -fm -if FM.raw -wave MyFMRadioRecord.wave`	Export FM audio to WAVE file

UDP JSON Status Streaming & Remote Access

Command Line	Description
`./RadI0 -f 8C -sn 1175 -stat 127.0.0.1:5000`	Broadcasts real-time JSON status over UDP (status, station name, frequency, dynamic label/RDS) for external displays and dashboards
`rtl_tcp -a 0.0.0.0 -p 1234`	Start rtl_tcp server on remote host with RTL-SDR dongle connected

Used NuGet Packages

Package	Purpose
RTLSDR	Low-level RTL-SDR driver support and device state handling
RTLSDR.Common	Shared DSP utilities, audio data structures, worker helpers
RTLSDR.Audio	Audio playback abstractions and AAC decoding support
RTLSDR.FM	FM demodulation and stereo decoding
RTLSDR.DAB	DAB+ signal processing, ensemble/service discovery, AAC extraction
Powershell.Modules	PowerShell module helping build and deploy RadI0

Installation & Dependencies

Platform	Instructions
Linux	`sudo apt-get install libfaad2 rtl-sdr libasound2 libasound2-dev libvlc-dev vlc libvlc-bin` Extract release archive (`.tar.xz`) and run `./RadI0`
Windows	Install RTL2832U driver using Zadig, download osmocom rtl-sdr Windows binaries and `libfaad2.dll`, add to PATH, and extract release (`.7z`)
License	GNU General Public License v2 (GPL-2.0)