History: What are the common parameters for an equalizer?

What are the common parameters for an equalizer?

• The equalizer has color, amplitude, gain.
  Each filter has its own set.
• Each filter has its own filter parameters of color, amplitude, gain.
  These aren't the right parameters.
• The equalizer has type, cutoff, q, gain.
  Each filter has its own set.
• Each filter has its own filter parameters of type, cutoff, q, gain.
  Great job!