Pete Midi in a sometimes boring video sets out to use what he analyzes to be three core features of the Hydrasynth for his analog synth setup and experiment. His judgement of the three core features (i have about twenty in mine) is wavescan, polyphonic aftertouch (which he calls poly-pressure) and the stereo audio signal path. He uses his singular collection from the equipment he owns to make some (not so) similar sounds, though it’s a worthy experiment.
There are Eurorack options to do any of whatever Hydrasynth feature you decide to do. It’s always fun to think about how to do whatever some piece of equipment allows you to do, in some other manner with the equipment you’ve got or acquire. It’s all a way to get an idea.
A for instance might be the Hydrasynth’s Threeler filter using three of your own filters.
The same applies if someone only works in the box. I’ve sometimes thought about this to simulate some aspects of the Quantum. (Thankfully i won’t have to do this with the Hydrasynth soon enough.)