Abstract: The invention relates to a portable content presentation device (101) such as a portable audio player. The portable presentation device (101) comprises a content signal source (103) for providing a first content signal. A memory (111) buffers content signal to provide electronic shock protection. The portable presentation device (101) comprises a presentation signal generator (105) which generates a suitable presentation signal. The portable presentation device (101) also comprises a memory controller (113) which dynamically adjusts the buffer memory allocation and creates a second memory allocation of the memory (111) for a second application. A portability processor (123) determines a portability state, e.g. indicating stationary or portable use, and the memory allocation is in response thereto, such that the buffer memory is reallocated to the second application, when the portable presentation device (101) is used in a stationary mode.