I think it is still a two step process until it is added to ld-decode. There is FPGA code in staffanu's repo which opens the door to new AC-3 RF demodulators or modding players to output the demodulated signal.

Basically, the DdD converts the analog signal from the disc into a raw digital signal. You then have to decode the output (RGB visual data, analog audio, and digital EFM track if it exists), and run further run the output through whatever filters (probably in ffmpeg but it can technically be other programs) are required to produce a final A/V signal your eyes & ears can process. The digital track can also be processed and the data or audio "ripped" somewhat like a CD. I've used it to extract some audio and confirm that the audio is a perfect copy of whatever's on the digital track (or, if the software and/or the disc are janky, where the glitches occur, assuming they can be noticed, which isn't always the case). You could use it to grab the data from LaserActive games but that's another story. I believe all this also works for MUSE discs, although I'm not aware of the current status of MUSE decoding. (If anybody wants to buy me and the DdD devs a MUSE player to mod and play with....)