I was wondering if you set the tone control the way you like it, in my case, with my iPhone 4, and is my tone control setting stored internally in the Dock? Or, does the tone control just work with my iPhone, with the Audyssey app on it, plugged in? What I am asking is, if I use an iPod, instead of my iPhone, are the tone control preferences I selected with the iPhone only work with my phone attached? Or any iPod as well? Which obviously do not have the Audyssey App on them.