This could be used with modular synthesizer stuff, but you would have to be very careful about voltages, since the "logic module" here uses 3V and you'll most likely kill it with higher voltages or negative voltages on the inputs.

If you plan to use such digital logic gates in a modular synthesizer, you most likely want to add some protection circuit on the inputs and run the whole thing at 5V instead of 3V.

Good catch. I keep forgetting about voltage stuff when mixing manufacturers.