The Blackmagic Design Mini Converter, Audio to SDI, can embed four channels of analogue audio or eight channels of AES/EBU digital audio into any SDI video connection.
It embeds audio into 3G/HD/SD-SDI sources in up to 1080p60 resolution.
It also features a redundant SDI input to run a backup cable in case the first one is lost.
It comes in handy at crowded venues.