Of Limiters and Notch Filters

well some limiters will limit the entire signal at the same rate or attack ratio, and some are multiband limiters that can limit certain frequency ranges. for example; a low mid and highs limiter, one adjustable limiter for each section.

a notch filter will take specific frequency or frequencys out of the signal.

limiters will act depending on the amplitude of the input, and only limit when its necesary. in this way audio can be made louder for a quieter part, and then limited instead of overloading the signal when its a loud part.

when compared to just using a basic limiter, a multi-band limiter will be your best bet if your working with a full audio track instead of just one instrument. this way your loud bass drum will not reduce the nice mid sounds of the guitar :)

A notch filter is a constant removal of specific unwanted frequencys, not dependant on the incomming signal. they can be used to remove unwanted 60hz humm and other imperfections in the signal.

Hope this helps :')

-Donna

The last posting is excellent, in my opinion. A limiter typically limits the loudness or gain of all the "music" as though someone were very rapidly turning down the volume control whenever things start to get really loud. A notch filter would be like using a multiband filter usually with about 24 or more bands, (notch implies a narrow band) and turning down one or more of the bands where there is too much prominence of a particular "pitch" or frequency, and leaving it turned down. Notch filters are sometimes used to equalize speakers, or to make a room sound more neutral.

Geoffrey Reed