A year has passed since this request, and I've come to realize that any enhancements to the midi system is not going to happen. For better or worse, it appears Serato is focused on partnering and selling controllers.
However, I did want to share an option for those stumbling on this thread looking for a way to do this without having to reinvest in a competing DJ product. You will need to buy Bome's Midi Translator though.
With Bome's, your able to create midi modifier variables like your given in Traktor.
First, create your modifier; setting a variable you define in the rules.
Quote:
Incoming: Midi message, Control change, <CC#1>
Rules:
myshift = myshift + 1
if myshift>1 then myshift=0
Outgoing: none
Then, create your two midi signals for the same incoming value, but have the output vary based upon the value set by your modifier key.
First, the one where my modifier key is not pressed:
Quote:
Incoming: Midi message, Control change, <CC#2>
Rules:
if myshift!=0 then exit rules, skip Outgoing Action
Outgoing: <CC#2>
Next, the one where my modifier key is pressed:
Quote:
Incoming: Midi message, Control change, <CC#2>
Rules:
if myshift!=1 then exit rules, skip Outgoing Action
Outgoing: <CC#19>
Notice, the incoming midi is the same, but the output differs. With this, you can then bind the midi signals CC#2 & CC#19 as normal in Serato. There may be a better way to do this, and there is definitely more that can be achieved with Bome's, but hopefully this will be enough to get started for those needing a solution.
Remember to switch off your controller and on Bome's translator in the devices of Serato DJ's setup.
