SDR++

SDR++ is a free, open-source software-defined radio application designed for receiving and analyzing radio signals through compatible SDR hardware. It provides a lightweight interface for tuning frequencies, viewing spectrum activity, and demodulating transmissions. The application supports multiple virtual frequency oscillators, allowing users to monitor several signals within an available bandwidth. Its hardware compatibility includes dedicated receiver modules and devices supported through SoapySDR. SDR++ uses SIMD-accelerated digital signal processing for efficient signal handling. Its waterfall display provides detailed visualization of radio activity over time. Available for Windows, macOS, Linux, and BSD, it features a modular architecture that allows developers to extend functionality through plugins.

Features

Real-time radio spectrum and waterfall visualization
Multiple virtual frequency oscillator support
Wide SDR hardware compatibility through SoapySDR
SIMD-accelerated digital signal processing
Radio signal tuning, filtering, and demodulation
Modular plugin architecture and cross-platform operation

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License

GNU General Public License version 3.0 (GPLv3)

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