The most important thing about Parametric Equalisation appears to be missing from this article. 'Q' Factor, that is what sets parametrics apart from Graphic Equalisation. Parametrics is used in every major recording studio worldwide to correct tonal balance of recordings as required.
Manipulating ‘Q’ factors is an everyday part of most HiFi manufacturers arsenal to set them apart from others trying to get the most ‘musical sound’. What I refer to as NiceFi, which is no longer HiFi as it deviates from the original sound so much and there is little most listeners can do. I prefer neutral sounding equipment, that many these days would consider ‘Bright’ because it doesn’t sound like the harmonically distorted ‘Warm’, which is just dulled treble and / or heightened bass which inevitably loses detail. Even cable manufacturers are guilty of this manipulation by using electrical properties, otherwise all cables would sound the same.
I currently use a Pre-Amplifier with Parametric Equalisation and have it set to adjust the most ear sensitive frequencies for certain recordings or for my mood. If I don’t want a rocking sound, I can mellow it for easier listening. But the important point is that I can easily bypass it at the touch of a button and don’t use it constantly, but as stated as the mood dictates.
Unfortunately, my current Pre-amp does not have automatic room correction, which many fail to see, as being the greatest colouration listeners will ever encounter, with manufacturer manipulated equipment a close second. Parametrics helps to negate these effects. I am currently looking to source a Pre-Amplifier with DSP as manual adjustment, other than for mood is very difficult, but the choice is limited to a small number of very high end manufacturers.
Without the most basic of equalisation, Home Cinema sound would be unlistenable to as sound arrived at different times to the listening position and become confused.
Interesting to see the subject understanding and lack of it here.