Patent ID: 8694139

Claim:
An information processing, apparatus comprising: a storage unit storing content data and first group identification information for identifying first groups in which the content data are arranged in a predetermined unit; a parameter output unit outputting a parameter having a value that corresponds solely to an amount of displacement of an operating object in response to an operation on the operating object which can be displaced in a predetermined range by a user's operation; a selection unit sequentially selecting the content data stored in the storage unit while the value of the parameter output from the parameter output unit is in a first range of values and sequentially selecting the first groups by sequentially selecting the first group identification information stored in the storage unit while the value of the parameter is in a second range of values; a notification unit notifying which content data is selected when the content data are selected by the selection unit and notifying what group is selected when the first groups are selected by the selection unit; and a playback unit for outputting the notified content data and first sound data corresponding to a title of the notified content data when the content data are selected by the selection unit and for outputting the notified group and second sound data corresponding to a title of the notified group when the first groups are selected by the selection unit, wherein the operating object is a rotatable operation unit, and wherein the parameter output unit outputs a parameter having a value that corresponds solely to an amount of rotation of the operation unit, wherein the content data are music data, wherein the notification unit notifies what music data is selected by playing back music data when the music data is selected by the selection unit, wherein the notification unit notifies what music data is selected by playing back a climax part of the selected music data, and wherein the notification unit changes the playback time for the climax part of the selected music data depending on the parameter output from the parameter output unit.