History: What are the common parameters of phasers and flangers?

What are the common parameters of phasers and flangers?

• Amplitude and frequency.
  Phasers and flangers are a bit more complex than this...
• Depth and rate.
  There's two other common parameters...
• Wet/dry mix, delay, depth, and rate.
  Perfect!
• Wet/dry mix and delay.
  There's two other common parameters...