To Audio 4 or Audio 8, that's the question.

[photojojo]

Get TSP with the A8, then you get timecode and software that along with the soundcard will let you pull up to just about every club on the planet and play music.

[Wickedsight]

So, now that it is clear that the A4 and A8 are compatible with the S4, and good man Rainer has shown how to unlock external mixing, does anybody else have good input about this?

[bumtsch]

Well, I have four good stereo inputs on my A8.

*hides*

Seriously though, if you have the extra €€, go for the A8. More inputs if you want to record in external mixer mode (that's assuming you don't use four timecoded decks!)