Which technology commonly interconnects different digital audio networks?

The correct answer is AES67, which is a standard that allows for the interoperability of various digital audio networks. This technology is crucial because different digital audio systems often use proprietary protocols that prevent them from communicating with one another seamlessly. AES67 establishes a set of guidelines for audio-over-IP streaming, enabling devices from different manufacturers and systems to work together effectively.

Implementing AES67 allows for a significant increase in flexibility within audio systems, as it facilitates the integration of different audio equipment and environments. This compatibility is essential for live sound, broadcasting, and recording applications where a variety of devices might be used in a common setup.

The other technologies mentioned serve specific functions but do not provide the same level of interoperability for audio networks as AES67. HDMI is primarily used for video and audio transmission between devices such as televisions and computers, MIDI is focused on musical instrument data communication, and USB is mainly for connecting peripherals to computers without addressing audio network interoperability directly.