Abstract
How are glottal source and vocal tract involved in the sopranos' passagio around E5? This pilot study investigates a legit soprano singing C5 to C6 with a lyrical technique and C5 to D7 in a light voice. On (de)crescendi and glissandi over the passagio, we observed clear bifurcations from light to lyrical mode, with discontinuous changes in f0, larynx vertical position, amplitude and shape of the electroglottographic signal. No such discontinuities occurred from C5 to D7 within the light mode. We established phonetograms of both modes and characterised differences in voice quality (Spectrum, Harmonicity, Open quotient). For [oe] in both modes, this singer tunes the first vocal tract resonance (R1) to f0 over the passagio. For a free vowel, a single and strong resonance is observed in the light mode, which may correspond to the merging of R1 and R2 and which is tuned to 2 f0 below C6, then to f0 until F6. Above F#6, two resonances are observed again and R2 is tuned to f0. All these observations sug...
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