Problems & a solution

• Coinciding or close-by partials causing both frequency and amplitude estimates to be inaccurate
• A solution
  • Use harmonic structure to constrain ``weak'' partials which are prone to errors
  • Many ways to measure ``weaknesses''
  • Deterministic measure of untrustworthiness of a partial using the spectral envelope
  • Motivated by the peak interference in peak-picking, which is related to our initialization