I'm trying to map a high pass filter to a single knob through the controller assignments function. I want multiple instruments to be controlled by the same knob so the filter can be the same value for each track as i turn it. Any ideas? Also curious to know simply how to find the high pass filter's other functions...meaning change the 'remove bass' function to and from something else if thats possible. I'm not real good with Macs--i bought it for logic I appreciate any help, thanks!