Approaches for enabling Supervisor Mode Execution Protection for a guest operating system which does not support SMEP. Each process is executed by a piece of hardware equipped with an operating system. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. The liquid injection and economizer vapor injection functions are selectively provided through distinct fluid passages leading to separate compression pockets. The control signals can control one or more operating parameters of one or more exercise devices, whether at once, or device specific.