I'd like to simulate ableton live in a way.

Say I have 4 different recorded 2 bar loops on 4 different tracks in the sequencer. Is there a way I can trigger one track to play/stop by using a specific knob/pad/key on a midi device?

So far I'm thinking of assigning the mute buttons on each tracks mix channel to a pad on my midi device but that seems pretty archaic - I'd like for the loop to end at the end of the loop like in Ableton live.

Is there any way to do this using reason?

Any help would be greatly appreciated. Thanks