The LA9310 has a powerful DSP onboard, that can be used to do perform real-time FFT on the data stream, without need for the data to actually leave the LA9310 or be processed by a power-hungry connected PC.
The data can then be visualized inside the browser interface with no user installs required.
The amount of data memory on the LA9310 allows us to perform 2k-wide FFTs in real time, or 4k-wide FFTs blocking.
Current development status
The LA9310's FFT cores are part of the DSP SDK. Everything around them, data in, LA9310 M4 core, browser display, fancy waterfall, etc, hasn't been done yet.