It is the process by which signals are used separately or separate channels for audio left and right. This will give achieves depth or dimension to the sound. Since stereo tracks contain twice the information of an equivalent mono file, they are twice the size. A three-way speaker system provides stereo sound to complement your presentation visuals.

Sound process that separates stereo audio into 5 or 6 channels. Also decodes Pro Logic encoded analog sources. It offers two modes, music and cinema. Music mode allows the left and right channels of a stereo signal to pass through without processing, retaining fidelity, but still adds signals for the remaining speakers. MPEG-1 only supports mono or stereo sound.  Multi-channel Television Sound (MTS) provides the ability to receive multiple audio channels with a single video channel allowing the user to select the type of audio desired such as mono, stereo, or Secondary Audio Programs (SAP).

If you are using component video inputs, then the audio must be plugged into the audio jacks on the base, not the projector. The speakers put out adequate sound volume. Not the "wall shaking" sound the brochure mentions but respectable for an "all-in-one" The InFocus IN1 Home Entertainment Game projector.type system. It sorely lacks that low frequency output, that is needed to do any serious wall shaking. The audio output, however may allow you to connect a small powered subwoofer.