In this paper we describe an approach to gathering design requirements for a software auditory display by analyzing user interactions with an ideal partner: a talking human controlling a computer. We explain the potential benefits of studying such unconstrained user interaction before detailing the design and execution of our qualitative evaluation. We report the results of our thematic coding analysis and give examples of each of the seven major user difficulties and preferences identified. To conclude the paper, we summarize the application of our results to the design of a software auditory display for common office computing tasks. Keywords Auditory display, requirements gathering, qualitative evaluation, formative evaluation, ideal interaction ACM Classification Keywords H.5.2. Information interfaces and presentation (e.g., HCI): User Interfaces---Voice I/O, auditory (nonspeech) feedback, evaluation/methodology. Copyright is held by the author/owner(s). CHI 2009, April 4 ? 9, 200...