The Blackmagic Design BMD-CABLE-ATEMAUDIO ATEM Switcher Audio Breakout Cable is used to bring analog audio into an ATEM 1M/E or 2M/E switcher a Blackmagic Design Audio Breakout Cable is REQUIRED to interface with the switcher's DB-15HD connector. The breakout cable is approximately two feet long, terminating in six XLR connectors that support two channels of input and output audio, as well as timecode in and out. Each cable is shielded to protect your signals.