History: What are the common parameters of a low frequency oscillator?

What are the common parameters of a low frequency oscillator?

• Shape, amplitude, and frequency.
  Yes!
• Amplitude and volume.
  Those two things essentially identical... physical and perceptual.
• Noise, spectrum, and rhythm.
  Nope, look for more basic parameters.
• Color, volume, and pitch.
  Those are perceptual, not physical.