Last week I talked about the importance of letting any end user choose the frequency range to which room correction is applied and allowing them to specify a target frequency response. In this weeks article I cover the last two functional criteria for a room correction product. Whilst these are less important than the first two, they are still important, and just make good sense! This week I cover the importance of not performing needless analog to digital conversions and providing measurement and filter generation capabilities.

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My research has led me the conclusion that there are a number of basic functional elements that ALL room correction devices should possess. These conclusions derive from a room acoustics viewpoint rather than a sound quality perspective. It is interesting that there are many devices on the market that do not meet these two basic criteria...

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According to Stereophile magazine, the top ('A' ranked) room correction or room EQ devices are the: Audyssey Sound Equalizer; Meridian 861 with MRC room correction; Rives Audio sub-PARC / PARC; SVSound AS-EQ1; Velodyne SMS-1 and the Z-Systems RDP-1 Reference. This article explores the pros and cons of each device from a purely functional perspective...here is an excerpt from the section on the SVSound AS-EQ1: "Designed for use with either single or dual subwoofers, the AS-EQ1 is based on a implementation of Audyssey's DSP room EQ code. Plug in the included measurement microphone and install the custom Windows based software onto your computer and you are ready to go! Because it uses Audyssey code many locations in the room are measured (up to 32) before the correction filters are generated. This makes it particularly suitable for use in a multi-seat home theater where the bass response and therefore degree of correction required will vary significantly from seat to seat"

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