Blackmagic Design DeckLink Quad EARasers you'll appreciate the built-in metronome

you'll appreciate the built-in metronome and the chromatic tuner

for a total of eight users

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The low-noise electronic circuitry provides high sensitivity and can handle SPL up to 156 dB

and then individual volume controls can be used for the level of each track

Blackmagic Design DeckLink Quad EARasers you'll appreciate the built-in metronomeDeckLink Quad includes 4 SDI inputs and 4 SDI outputs that can be switched between SD and HD video formats. Each SDI input and output is completely independent, and handled via a completely separate processing core. This means that each SDI input or output could be a different video standard as well as different content streams. DeckLink Quad can also capture and play back at the same time. A common genlock tri sync input is included. DeckLink Quad is