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REW Help Index



The Filter Tasks panel is used to control REW's automatic filter adjustment feature. REW can automatically assign and adjust filter settings to match the Predicted response to the target response.

The Match Range defines the frequency span over which REW attempts to match the target response, and within which filters will be assigned. REW can apply filters anywhere across the band, but it is usually best to limit filters to low frequencies (less than 200 Hz or so) unless you are compensating for some general characteristic in the speakers (an example might be a dip in the mid range or a bit too much HF) - that is using EQ as a fancy tone control.

Individual Max Boost sets the maximum boost that REW will allow for any individual filter. This can be set to zero to prevent REW assigning any boost filters.

Overall Max Boost sets the maximum boost that REW will allow for the combined effect of all the filters. This can be set to zero to prevent REW allowing any overall boost, but individual filters may still have boost.

In addition to the gain limits, boost filters are subject to Q limits to avoid inadvertently creating artificial resonances. The Q of boost filters is not allowed to exceed a value which would cause the filter's 60dB decay time to exceed approximately 500 ms (the actual Q limit value depends on the filter's gain).

The Flatness Target controls how tightly REW tries to match the Predicted response to the Target Response. The lower the Flatness Target, the more filters will be required.






Saludos.