qTA is a computational model of tone and intonationn (Prom-on, Xu & Thipakorn, 2009). It simulates F0 production as a third order linear system driven by pitch targets with variable slopes.
An early computational implementation of the Target Approximation (TA) model (Xu & Wang 2001). The program simulates F0 production as sequential relaxations toward syllable-synchronized pitch targets.
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