Equalisation/Tone-control

Tone control can be as simple or complex as you want it to be, but as with most elements of sound creation there are no stict rules,
At different stages of a mix or sound creation certain frequency ranges will reqiure a little tweekery, you will notice quite soon that different pieces of hardware or software will have more control over the sound than others.
One application may give you 2 bands to play with where as another may offer 32 bands to cut or boost as required, to the uneducated observer it may seem only logical that a 4 band EQ module may offer twice the control of its 2 band counter part and therfor a 32 band EQ if '16times better' than the 2 band module howver this is not the case...

Its all about where the bands are split and how sever a kill each band will perform, not to mention the characteristics of the hardware (or software).

To get the most out of your EQ its best to take alook at the manuals/specification sheet to see exacly where for example low/mid/high frequencies are divided, this will allow you to identify what meathod of equalisation is best situated for your current recording situation.

Its quite common for engineers or producers to use specific pieces of equipment to take advantage of good tone control. ...infact a whole mastering industry has grown out of it.