Disclosed herein, among other things, are methods and apparatus for hearing assistance devices, and in particular to behind the ear and receiver in canal hearing aids with distributed processing. One aspect of the present subject matter relates to a hearing assistance device including hearing assistance electronics in a housing configured to be worn above or behind an ear of a wearer. The hearing assistance device includes an ear piece configured to be worn in the ear of the wearer and a processing component at the ear piece configured to perform functions in the ear piece and to communicate with the hearing assistance electronics, in various embodiments.