PLPC Cello (1982)

• Periodic LPC used to estimate string-loop filter
• Normal LPC used for body model (40 poles)
• Excitation = Bandlimited impulse train:
  $$\sum_{k=1}^K \cos(k\omega_0 t) = \frac{\sin[(K+1/2)\omega_0t]}{2\sin(\omega_0t/2)} - \frac{1}{2}$$

• Bow-position simulation = variable-delay differencing comb filter (direct from physical interpretation)
• Sound Example:
  Moving Bow-Stroke Example: (WAV) (MP3)
  (Bowing point moves toward the ``bridge'')