I just had the idea for "transpose feature" for traktor that could be added using a mapping trick. Here's the idea:
Pick two buttons.
assign each to control the key knob for the desired deck.
set one to inc and the other button to dec
set the resolution for each to FINE
With each button press you will raise or lower the tracks key by one semitone. Thus, allowing you to transpose tracks to allow for more flexible harmonic mixing...if your into that sorta thing...
Bookmarks