Setting up keyboeard and pad differently on midi

Hey I bought a Alesis V25 and I want to use it with Ardour. Ardour can read the input from the midi without a problem. But I want to be able to have different sounds to the pads and to the keyboard. For example, I want to use pads to import some custom sounds that I have recorded ( or some drums) and to the keys to have some synth. Is any plugin that does that? or I have to write my own?