Audio data are played back by a personal computer a relationship with a playback process recognized easily. A line encoding the data is over-sampled. A trench is formed in the multi-layer device stack. An elastically deformable movable contact engages and disengages the first and second fixed contacts. This example additionally includes storing the calculated parity protection strip parity values, in corresponding parity protection strips. Thus, even if the turbine air expanded in a heat insulated state and reduced in temperature flows in the discharge air passage, the housing can be prevented from being cooled by the discharge air by flowing a heat insulated air with a temperature higher than that of the discharge air in the heat insulated air discharge passage.