Howdy

Is there a box that converts multiple 2-channel digital signal into a single 8-channel signal?

For example, if I have a couple of 2-channel A/Ds, a synth with SPDIF out and maybe an FX unit, is there a box that will let me connect them in pairs to the 8 outs of the multi-channel connection?

So...

AD 1 appears on the lightpipe out as 1&2
AD 2 appears on the lightpipe out as 3&4
Synth appears on the lightpipe out as 5&6
FX appears on the lightpipe out as 7&8

Anyone know anything that does this?