Before you head to the airport, especially if this is your first airline flight in a while, you should take the time to get familiar with common security rules and basic baggage rules, and remember to keep valuable or critical personal items in your what to put in your carry-on baggage and not in your checked luggage. If you can put it in a checked bag before passing through airport security, you don't have to take any precautions. 2  If you purchased the item after passing through security, and you are on the last leg of your trip, you can put the item in your carry-on bag.
Put simply, MADI (Multi-channel Audio Digital Interface) allows you to send up to 64 discrete channels of audio via a single fibre optic cable or coaxial cable and over distances of up to 2km.
S/PDIF (Sony/Philips Digital Interface) is the consumer version of this protocol, which uses either RCA leads or optical cables identical to lightpipe cables. MADI can carry 64 channels of audio at 48 kHz and 28 channels at 96 kHz.owever, the data streams of the two protocols are totally incompatible. S/PDIF is mostly used for transferring stereo or multi-channel surround sound audio, whereas the ADAT optical interface supports up to 8 channels at 48 kHz, 24 bit. Recently, Lightpipe devices have been successfully interfaced via FireWire.