This variable covers all the YOUs, primarily You, the walker. To what degree do you, the maker, address the walker as “you.” The implied you in “Start walking.”
Do you want to compose an I-You relationship?
What would it be like to exclude the possibility of address from the text of the audio walk? What kind of invitation does it create? How does the walker understand her relationship to the voice or voices she hears?
Then there is a second person address that isn’t imperative (“you, do this!”) but descriptive (“You reach the corner by putting one foot in front of the other. You look around.” In this descriptive you, the walker is invited to inhabit the description, either imaginatively or by complying with the the descriptions. It could even be a way of calling a dance (the way square dances are “called”), with the walker complying in lag-time (“You step around something. You close your eyes. You turn your head and move toward the first new thing that enters your field of vision…”).
Then there is the question for You the maker: who am I to you? Imagine the walker asks this of the maker, who am I to you? Who are you and why have you made this thing? Why are you asking me to move in this way through space?