Quantitative Target Approximation Model

(Prom-on, Xu & Thipakorn 2006)
Initial settings Starting pitch: Upper bound: Lower bound: Order:

Parameter settings Tones(H/R/L/F/N) Durations(s/n/l) Strengths(w/n/s)
Pitch Targets


Press the "Simulate" button to display model-generated F0 curve and the underlying pitch targets. Make changes in any of the editable boxes and then press "Simulate" again to see the effects

Initial settings:

Starting pitch: The starting point for the first syllable in your sequence.
Upper bound: The upper limit on your y axis.
Lower bound: The lower limit on your y axis.
Order: Specify the number of derivative in the system.

Parameter settings (categorical settings):

Tones: Tone specification for each syllable in your sequence.
Duration: Duration specification for each syllable in your sequence.
Strength: Strength specification for each syllable in your sequence.

Pitch Targets:

Specifications for the target height and slope of tone categories in Hz. Dynamic targets such as R or F have a positive or negative slope respectively. Static targets such as H or L have a slope of 0.

Durations and strengths:

Duration(s) and strength specification for each categories.


Basic assumption: Production of tone and intonation is a process of successively approaching syllabic pitch targets at varying pitch ranges with different levels of strength.
Pitch targets: specified by: y = b + a * x, where b is height and a is slope.
Duration: Specifies duration of each syllable, which is the temporal domain of a target.
Strength: Determines the amount of strength used to approach a target. Greater strength leads to faster target approximation.