The [*~] object can take either an audio or control input on its right inlet.

I want to create an abstraction that does something similar and can take either type on its right inlet. How do I do that?

@AlanMJackson Not possible in an abstraction. The object will spread the inlets across the top.
You would have to make an external. Look in Pd/doc/6.externs for some examples and a readme explaining how to compile one.
David.

@whale-av ah, thanks!