[quote name='pantherairsoft' timestamp='1382712818' post='2255823']
Do you mean that the frequencies roll off directly after the frequency you select to boost?
If so, this is a regular Low Pass filter. Your cutoff frequency can be selected and boosted, and everything after it is removed. Typically this will have only s cutoff and a resonance control.
[/quote]
Sort of I guess...A low pass filter with a 3db or 6db boost at the cut off
I am using REAPER and I use either of thse two methods:
1. http://www.timelessofficial.com/timeless/index.php?option=com_content&view=article&id=122&Itemid=148
2. Or this software does the exact same: http://www.gvst.co.uk/glow_screenshot.htm