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For Those of You Using Graphic EQ's

OK, so I hear you guys. Ultimately everyone judges their EQ by hearing it. But after deciding (by ear) that you want to change a given parameter of your tone, you look at the EQ controls as you tweak them, right? If every bass amp manufacturer decides to print values next to the EQ knobs or sliders, and if several people have already pointed out the need for braille next to controls (so that blind people can read those values), and if terms like "smiley face" EQ exist to describe tone, then, IMO, it is painfully obvious that people who use these products use their vision to adjust EQ. Yes, of course, they use their ears, probably more than their vision, hell, maybe they feel the vibrations through the floor, but they use their eyes. Blind people can hear, blind people can't see. Therefore, it seems completely logical, IMO, that blind people cannot take advantage of a significant part of the EQ adjusting process. If that's a given, then they must feel the controls in place of their sight to aid their ears in the adjusting of their EQ. I think feeling the linear distance between two points would be way easier than feeling the angular distance between two points in a rotation, thus, the graphic EQ. Again, the graphic EQ is also very easily distinguishable from the rest of the knobs on the amp.
 
Do you guys set your tone every time you go to play by listening? I know I don't.
I do. First I sweep my parametric notch filter frequency to remove any boom, or switch it out if I don't need it, and then I fiddle with the level of each EQ band until it sounds right. It may take a few more tweaks during the first three or four songs to get it right, and from that point on any other tonal changes I get via technique.
 
I do. First I sweep my parametric notch filter frequency to remove any boom, or switch it out if I don't need it, and then I fiddle with the level of each EQ band until it sounds right. It may take a few more tweaks during the first three or four songs to get it right, and from that point on any other tonal changes I get via technique.

Thanks, Bill. This helps. Do you start from center position on all bands?
To clarify, when I said I don't set my EQ by ear every time, what I meant was that when I go to practice, I have a good enough idea of what kind of sound I want for that room that I can get close by looking at the EQ. Certainly on stage it would be necessary to start from scratch.

Does anyone have any specific complaints about graphic EQ's vs. knobbed-based ones (non parametric)?