SigDigger is a free digital signal analyzer with an intuitive Qt5 interface, originally designed for GNU/Linux but that has been successfully ported to macOS as well. In this talk, I will give a brief introduction to SigDigger, what are its use cases, and why it is a reasonable option with respect to existing alternatives. In order to better illustrate these use cases, I will perform a live demonstration of its features and capabilities and give some real-time performance figures. I will then describe its internals, how the demodulator pipeline is implemented, why it is so fast, and why it could be even faster. I will finish with the mid-term goals of the project, WIP, and a request for collaboration for anyone who could be interested in making this software grow.