well..
you need the 8-outs if you want to control each track you have on a sequence...
you can assign certain tracks to certain out lines (up to

then control the freqs and level of each track on your external mixing board...
if you just want to run your MP out into a standard channel "DJ" mixer - the answer is no - you just need a 1/4" to RCA cord to run into your mixer
But - Ill bet you wanna link your MP up to an analog mixing board - so - cop the 8-outs -
peace
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With knowledge ...
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Comes sorrow.
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.No Jesus? No peace. Know Jesus? Know peace.