Selection of boxes for extracting audio signals from the HDMI cable en route from a player or digital box to a TV or projector. These boxes are known as audio extractors or HDMI audio converters and sound splitters.

Extractor boxes are used e.g. to extract the digital audio signal from the HDMI signal, and convert it to a standard analogue stereo/multi-channel (Phono RCA or MiniJack) signal, or to a digital audio signal (optical Toslink and Coaxial RCA). The signal can then be used to connect a soundbar or amplifier, e.g. if there are no other outputs in the device with an HDMI output.