The spectrum comes alive.
Spectrum and waterfall displays, multiple receive channels and independent VFOs to follow the activity. Receive SSB, CW, AM and FM.

Explore the spectrum, open multiple receive channels and revisit signals in your recordings. The Decodium ecosystem’s SDR receiver for local and network sources.
Spectrum and waterfall displays, multiple receive channels and independent VFOs to follow the activity. Receive SSB, CW, AM and FM.
Native RTL-SDR, compatible devices through SoapySDR and network sources including rtl_tcp, SpyServer and SDR++ Server.
IQ and audio recording, frequency memories and a band scanner to explore and organise your listening.
Features, integrations and operating conditions, with direct links to project sources.
The connection guideReopen an IQ recording, find a moment and tune to another signal within the recorded bandwidth. Pause, seeking and looping help you explore it. An audio file preserves the demodulated sound instead; when keeping IQ files, retain their recording metadata alongside them.
Source & documentationThe scheduler plans tuning, scanning, and the start or stop of IQ and audio recordings using UTC times. It handles reception only. Keep the application running with a connected source; jobs missed while it was closed are not automatically replayed when it starts again.
Source & documentationThe audio + CAT backend receives demodulated audio from a compatible radio and follows its frequency and mode through direct control or rigctld. On this path, the displayed spectrum is limited to the available audio bandwidth; it does not become a wideband RF IQ stream.
Source & documentationA USB receiver, a network source or the demonstration backend: start with the path that suits your station.
Getting started with SDR