I have inserted an Instrument Track - Komplete Kontrol.
Input from Nector LX61 (USB) - the latency is not noticeable. [while Transport Stop]
Once I play the song [approx. 20 audio tracks, all other MIDI tracks are in archive state], if I play the Nector the response is delayed a lot more than 200-300 ms.
 
How to overcome this?
 
I tried with another instrument track with Rapture Session - result is same.
Also I copied a midi clip in those instrument track - playback is smooth.
 
Regards
Snehankur

There are two source of latency in your control, the audio interface driver settings and plug-ins used in the project. If the driver is set to low latency, try bypassing the effects with either the FX button in the Mix module or with shortcut "E."