MiniTOSLINK

MiniTOSLINK, also referred to as mini-TOSLINK or TOSLINK Mini, is a compact optical digital audio interface used to transmit S/PDIF data over a fiber-optic link through a 3.5 mm mini-jack-style connector. It provides the same digital audio data as a full-size TOSLINK connection but in a smaller form factor, enabling digital audio output on compact devices such as laptops and portable players.

Operation and formats: The signal carried by miniTOSLINK is S/PDIF-encoded. The link can carry stereo PCM audio or multi-channel content encoded within the S/PDIF stream, such as Dolby Digital or DTS, depending on device capabilities. The transmission is optical, using light rather than an electrical signal.

Physical interface and adapters: The mini connector resembles a 3.5 mm audio plug but is dedicated to optical transmission. It is not electrically compatible with analog audio jacks. To connect to standard, full-size TOSLINK equipment, a miniTOSLINK-to-TOSLINK adapter or a dedicated cable is used.

Usage and compatibility: MiniTOSLINK ports appear on a range of consumer devices, including laptops, camcorders, and some AV gear, where digital audio output is required in a compact form. Availability varies by manufacturer, and some devices provide only the mini port with limited format support; others include adapters or dual-format ports.