EQ is a tool that can be used to change the frequency in audio A instruments tremble creates different sounds allowing us to adjust the EQ off of the different tremble Masking happens whenever two or more sound overlap, creating a affect of not being able to hear them both Filters such as Type, Slope, Q, and gain are used to help boost the audio or to cut the audio Additive EQ is adding frequencies, and subbductive takes them away to create the sound you are looking for