Basic glossary
Filter aka equalizer aka EQ
http://en.wikipedia.org/wiki/Equalization
dB = logarithmic audio-unit, that indicated sound pressure level (aka SPL)
http://en.wikipedia.org/wiki/Decibel
boost = increase amount, eg +2.1dB
cut = decrease amount, eg -3.7dB
Filter frequenzy aka hz aka hertz
http://en.wikipedia.org/wiki/Hertz
khz = kilohertz, and you already knew that kilo means 1000 (if you went to school), so then 3khz means 3000hz and 3.1khz is 3100hz etc
Subtractive EQ = an EQ that only cuts and doesn't boost, on electronics it would be called "passive"
http://en.wikipedia.org/wiki/Subtractive_synthesis
Q = width of the filter, usually within 0.25 and 3 octaves
Filtertypes are "peak", "notch/bandpass", "hi/lo-shelf" "hi/lo-pass".
http://en.wikipedia.org/wiki/Filter_design#The_frequency_function
peak is something that looks like a spike or a bell
notch removes a certain area completely
http://en.wikipedia.org/wiki/Notch_filter
bandpass does the opposite and leaves only that certain area
http://en.wikipedia.org/wiki/Bandpass_filter
lowshelf boosts basses, highshelf boosts treble
highpass removes basses, lowpass removes treble
http://en.wikipedia.org/wiki/High-pass_filter http://en.wikipedia.org/wiki/Low-pass_filter
Also this is my sig in KVR audio forums just because it gets asked so frequently:
"
Basic EQ tip: highpass all that don't hit subs, usually all but bass and kick"
This gives more room for kick and bass to work and increases clarity on the bottom end
A short story about yesterday...
I was doing a mix last night (oh wait, I just woke up and its 2am now, so it must've been day when I was mixing... fokken darkness) and I doing EQing for kick and when I was switching the bandtype from "bypass", then I accidentally clicked on the "notch filter" instead of a "peak" in the EQ and I had the Cubase tapesaturation plugin (Magneto) after that and I was amazed that the notch filter actually sounded really f*cking good. The filterfrequenzy was right at the middle of the mud by default, so guess it was between 400-800 (I usually use subtractive EQ style around that area when I'm mixing bands live, so I was not wondering why it sounded good), but I was amazed how F*CKING GOOD it sounded when I actually widened it up a little and it sounded even better! I mean, sometimes good accidents happen.
I really suggest that if you don't have a treated room, put that on high priority on your TODO-listen and while waiting start using headphones and your current system and then start using EQ. After you are done, listen to your finished product with different systems and then fix if something needs to be fixed. This way you can get much faster to actually "doing the thing" instead of first redecorating your room for one month. But remember to rest your ears, they can get really tired after 30 minutes of mixing. I suggest 20-30 mins mixing, 5-10 mins break, repeat. And mix with your ears, not eyes. To find out what sounds like shit, boost any free band +9..15dB and then start
slowly sweeping the frequency and stop when you find it. Then cut it, until it start to sound good again.