Pre-emphasis, a Hamming window and the autocorrelation method is used for all analyses. If a Tx item used to position analysis windows, the window size defaults to the pitch period. Treat all frames as voiced. Default is to use autocorrelation pitch detector and adapt analysis to voicing decision.
Voiced frames are pre-emphasised, unvoiced frames use half as many poles.
Negative is earlier, positive later. Windows less than 20ms are treated as voiced.