Originally Posted by
nem0nic
In the Deckadance and Traktor mappings those buttons are of course loop size modifiers. That's the purpose of that set of controls. But it's trivial to re-map them.
Not sure that's going to work out quite how you're expecting. Maybe I'm misunderstanding your question. The Studio 4a controls 4 decks, and the 1 & 2 buttons above the faders are there to indicate effects assignment. With Decks A and B active, you certainly could map buttons 1 & 2 on the Deck B fader to represent FX 3 &4 for Deck A, but then what would tell you what FX are assigned to Deck B.
Correct. Deck switching on the 4a is accomplished via firmware and not based on modifiers, because most DJ software doesn't have modifiers.