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1

Intonation accuracy and pitch stability during crescendo as the voice quality and singer’s experience indicator among choral singers

Gawlik Mateusz, Wszołek Wiesław

Vibrations in Physical Systems

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2019

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Vol. 30, nr 1

art. no. 2019138

EN

The ability to correctly reproduce notes by the voice is one of the essential features of the singing task and called intonation. In combination with other parameters like timbre, formants, and sound attack, it affects the reception of listening impressions. In this paper, we present results of the examination concerning the automatic evaluation of intonation among the nonsingers, untrained and trained choral singers. We performed both pitch error during vocalization and pitch stability in crescendo task analysis among studied groups. We used Zero Band Filtering method to determine fundamental frequency from the singing signal. We noticed significant differences between singers with different skills and experience, and the possibility to classify the level of advancement of the singer by using intonation characteristic.

2

Quality assessment of intonation of choir singers using F0 and trend lines for singing sequence

Półrolniczak E., Łazoryszczak M.

Metody Informatyki Stosowanej

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2011

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nr 4

259-268

EN

In this paper a part of quality assessment process of the intonation of singing voice is described. Intonation is understood here as the ability to precisely reproduce a given pitch. Such evaluation is typically performed by voice production experts (voice trainers) or other persons associated with singing. For the purpose of determining the quality of intonation an exercise performed by singers on subsequent pitches was proposed in the article. One of pitch extraction methods is used to determine the fundamental frequency and estimate the F0 trajectory. Based on the obtained trajectory, an attempt is made to determine a general trend among tested singers. It is also indicated, that it is possible to point out problems in singing for tested persons, which can be useful in further stages of voice training.

3

The impact of the type of sung vowels on the singing quality

Półrolniczak E., Łazoryszczak M., Mąka M.

Elektronika : konstrukcje, technologie, zastosowania

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2011

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Vol. 52, nr 11

112-114

EN

The paper presents an approach of assessment of singing quality based on properties of fundamental frequency (FO) trajectories. An analysis of singing has been performed using exercise with dedicated phrase containing consecutive vowels at the same pitch. The frequency deviations between voice's pitch and target tonality along with intonation trends have been considered at evaluation stage. Performed experiments show that in case of short duration of singing sounds, the vowel type is independent of whole phrase. The special case was/o/vowel which had decreasing trend in terms of intonation. Proposed technique of singing voice assessment is characterized by simplicity and low computational complexity, thus can be used in real-time applications.

PL

W pracy przedstawiono technikę oceny jakości głosu śpiewanego z wykorzystaniem własności trajektorii częstotliwości tonu krtaniowego (FO). Przeprowadzono analizę śpiewu z użyciem ćwiczenia, na które składala się fraza zawierająca samogłoski śpiewane kolejno na tej samej wysokości dźwięku. Wykorzystano pomiar odchylenia częstotliwości pomiędzy śpiewanymi i zadanymi dźwiękami. Przeprowadzone eksperymenty pokazują, że w sytuacji, gdy czas trwania śpiewanej głoski jest krótki to ich rodzaj nie miał znaczącego wpływu na całość frazy. Wyjątkiem była tu głoska /o/, która we wszystkich przypadkach wykazywała trend zniżkowy, jeśli chodzi o intonację. Proponowane podejście oceny głosu śpiewanego charakteryzuje się prostotą i niską złożoności obliczeniową, co stwarza możliwości jego wykorzystania w zastosowaniach czasu rzeczywistego.