In audio processing technology there are interfaces of different type, the different interface types being associated with differing sample clock frequencies andor differing data frame or data word formats. Also included is an apparatus comprising at least one processor configured to implement a method comprising recognizing reception of a signal, and adjusting a threshold and a clock phase associated with the signal using a rising time for the signal and a falling time for the signal. Structure is also provided for connecting each contact to a second portion of the electronic device.