I just got my TTM57SL. If I use only two turntables do I have the option to use Serato and normal analog playback from the same turntables without switching inputs behind the mixer?

How is that supposed to work? If you use Serato on one channel you need the control signal (unless you are working in internal mode, which doesnt make much sense here - you could always playback from internal mode from any deck), then you cant play normal audio vinyl.

Am I missing the point?

I think he means can he switch from serato to playing a regular record right ont he same turntable without switchign any inputs..

I might be to tired to understand ;)

The answer is yes if I am interpreting the question correctly. A1, A2, A3, A4 will play an analog signal. Just turn the program knob.

Oh, put on a regular vinyl and put the needle on the record when the drum beats go like this...

Serato make it very easy by lighting up the setting you need to turn the knob to on each side.