React · SwiftUI · agent guides
Jack
A knurled satin-steel nut around a socket, where a plug seats. The socket is a cut, dark at the bottom with its top wall in shadow; lit, a lamp glows down there in a signal colour.
Use it for
- Where a connection is made in a gadget: the patch bay's sockets, a rig's inputs and outputs.
- A socket that shows a state from inside: lit green for live, blue for a link.
Don't use it for
- A button or a knob: a jack is never turned or pressed. The plug in it moves; the jack stays.
- A decorative ring: if nothing plugs in, it is not a jack.