1. An electronic device, comprising: a host subsystem comprising a main bus coupled to a first plurality of components comprising a host processor, a memory controller, and a memory device; and a media processing subsystem separate from the host subsystem and comprising: a second plurality of components comprising a digital signal processor and an audio output device; an audio bus coupled to the second plurality of components; a subsystem interface configured to loosely couple the media processing subsystem to the main bus of the host subsystem, such that the second plurality of components are inaccessible by the host processor and the second plurality of components are unable to access the main bus of the host subsystem; and wherein the host processor is configured to issue an instruction to the memory controller to cause a segment of audio data stored in the memory device to be provided to the main bus, wherein the subsystem interface is configured to transfer the audio data from the main bus to the audio bus, and wherein the digital signal processor is configured to process the audio data received via the audio bus and to route the audio data to the audio output device.