Running a Stereo track through MIDI controllers

I’m currently working on a project that I’m trying to fade the song out using a high pass filter from my MIDI keyboard, and, while this is going on, mute the drums, then bring them back in to create a sort-of bass drop. Now, the main melody of the song is on the left channel I believe, and the drums on the right. Is there a way I could route the individual channels to my two separate keyboards so that I could do this manually if I was playing the song live?

Thanks

MIDI is not audio http://en.wikipedia.org/wiki/MIDI
Is your keyboard able to apply filters to audio coming in through an audio input?

Yep, sorry for posting in the wrong thread.

Thanks