nope, but it can record 1 stereo audio track at a time. you can keep on recording guitars, keys, vocals, skracthes, synths, etc untill your memory is full (max 512mb).
you can eq every part, sample, multi apart (tripple filter, notch and eq, eq+ ... and other filters of course)
you can control the main mixer and every program in Aksys on a pc with the mouse. Aksys also integrates well witha to be specified audio editor (soudforge, recycle, whatever). Also drag n drop is a breeze!
if the mpc3000 has the same sampler engine as the s3000 series, then the 4k defenitly sounds better! Also 24bit/48000hz is a big difference!
the pads on the 4k are the worst ones from all mpc´s
the 4k gets kinda slow when you enter and want to edit big programs (+20mb) ecpesially when in play mode
elmacaco, if you dont want to view the edits you do on samples (trims), you just dont watch to the screen while turning the wheel! believe me, a graphical interface is dope for looping samples. its more of a must, actually
I think the MPC3000 is overpriced? It has Vintage written all over it

You will be better off (and more cheap) with an MPC60 + Z4 combo.
So I would either go for the MPC4000 or MPC60 + Z4/8