Source-Filter Synthesis of the Singing Voice (original) (raw)

Traditionally, voice production has been modeled using the source-filter approach. Now, the glottal airflow can be interpreted as the source and the oral and nasal cavities can be modeled as the filter. The filters are based either on representing the formants, i.e., the resonances of the vocal tract, or on modeling the articulation, i.e., the shape of the vocal tract. The source signal depends on the voice to be produced, and it is traditionally modeled as a sequence of geometric pulses or as random noise. However, more accurate source signals can be obtained by utilizing the inverse filtering technique or by modeling the vocal folds as oscillating masses.