If the device supports Dolby Digital it can deliver up to six different audio channels (sides) for a much better sound quality.
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
This technology adjusts the volume of the device according with what the video player needs.
Devices with a subwoofer have a higher quality, deeper bass.
If a device supports Dolby Digital MS10 it can decode Dolby Digital and Dolby Digital Plus.
Devices that support Digital Out can deliver sound through optic fiber audio cables (like TOSLINK) or coaxial audio cables, which can transmit high-resolution audio at fast speeds.
Dolby Audio is a group of audio technologies that use advanced audio formatting and processing to deliver crystal clear surround sound, enhanced volume, and automatic volume control. This includes Dolby Digital, Digital Plus, TrueHD, Dolby Volume, Dolby Pro Logic IIz, Dolby AC-4, and others launched before Dolby Atmos and Voice.
A microphone port allows connecting external high-end or specialized microphones.
A stereo microphone allows to record audio files or movies in stereo without an external microphone.