Patent ID: 7564983

Claim:
A play-back device comprising: a plurality of play-back sources; a first output unit and a second output unit for selecting at least one of the play-back sources to output play-back signals from the at least one of the play-back sources; a first operation unit for operations relating to the first output unit; a second operation unit for operations relating to the second output unit; a control unit for deciding whether the first output unit and the second output unit have selected a common play-back source and whether the play-back signals from the common play-back source are in an output-stopped state and for inhibiting the release of the output-stopped state from a lower priority one of the first operation unit and the second operation unit in response to the control unit deciding that the play-back signals from the common play-back source are in an output-stopped state; and a priority setting unit for setting a priority for the first operation unit and the second operation unit.