Since you mentioned 4.4mm, thought I would chime in and mention pentaconn (the trade name) which is a TRRRS connection (which does include a ground connection as well as L+/L-/R+/R-. I still do not understand the purpose of the ground connection in these plugs since there's nothing to ground on the other end.
Since you mentioned 4.4mm, thought I would chime in and mention pentaconn (the trade name) which is a TRRRS connection (which does include a ground connection as well as L+/L-/R+/R-. I still do not understand the purpose of the ground connection in these plugs since there's nothing to ground on the other end.