The Blackmagic Design ATEM 4 M/E Broadcast Studio 4K is a live switcher designed for HD and UHD 4K broadcast productions. Twenty 12G-SDI inputs support UHD 4K video up to 59.94 fps, and are backward compatible with 1080p, 1080i, or 720p sources as well (inputs do not feature scaling, so all sources must be of the same resolution). All inputs are frame synchronized, so non-genlocked sources can be used. Audio is supported via all SDI inputs plus 2 sets of dedicated analog stereo inputs via XLR and RCA. For in-the-box mixing, connect a computer running ATEM software control, and have immediate control of all audio channel inputs. Connections for timecode, reference, and control are also available. SDI outputs are available for program and preview, and they can operate at either HD or UHD resolutions, just like the inputs. Two preview outputs allow you to spread your multi-view over two displays.