DSP: Broad changes
I have likely been harping enough on why I am not a fan of DSP. I think my biggest complaint includes trying to leverage its power for room correction. But now let's focus on how it can be used well. We talked already of its power helping reasonably designed loudspeakers sound their best when built in or designed around it, like the Emerald Physics. They took good advantage of its power by applying broad changes to the frequency and phase response for good benefit. I mention broad changes. What's meant here is the frequency range. We want to keep it widespread, affecting a relatively large area gently. Improvements on this scale aren't so easily ruined by small movements of the listener's or speaker's position. By spreading the energy over a broad range, we can use DSP in more effective ways. Because DSP is so bloody powerful, it's tempting for designers to make minute changes using complex comb filters to remove small problem areas. These tend to be effective for a specific listener position, but ineffective for practical use. Another good example of using DSP to great advantage is a speaker like the Avantegarde Zero. Designers have the advantage of a fully integrated self amplified horn they can use broad DSP manipulation to obviate the problems suffered by all horns (cup your hands around your mouth and listen to the change in frequency response when you speak). But, DSP can fix horn colorations easily and those changes are heard at almost all listening positions, allowing the advantages of the horn to shine through, without suffering its dreadful colorations.
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