EQing a nylon string guitar isn't all that different from a regular steel-string acoustic, but there are some differences.
EQing a piano doesn't have to be a big deal. There are just a few things to keep in mind.
A tutorial on how to automate the equalizer in Garageband. This article also explores the automation presets.
How to EQ a flute, including an illustrated guide and other important things to consider.
In this tutorial, I show you how to EQ acoustic, clean, and distorted guitars in Garageband, in addition to important concepts and tips to consider.
A thorough explanation of EQ and how to use it in Garageband