Research

As the national university, we champion and support innovative research that addresses the country’s most pressing challenges.

10 Jan 2024

UP Diliman

There is a clear correlation between planktonic foraminifera fluxes and seasonally changing environmental conditions

Planktonic foraminifera are calcareous zooplankton inhibiting the water column. They are sensitive to hydrographic stresses, and variations in their population...

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09 Jan 2024

UP Diliman, UP Los Baños, UP System

Replacing gravel with coconut shell aggregates does not make concrete harder and less prone to corrosion

Utilizing coconut shell aggregates (CSA) in concrete benefits agricultural waste management and reduces the demand for mineral resources. Several studies...

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05 Jan 2024

UP Diliman

Social media fueled widespread dissemination of disinformation narratives during the 2022 Philippine national election campaign period

Social media played a significant role in the 2022 Philippine national elections. Using various empirical sources, including an original pre-electoral...

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04 Jan 2024

UP Diliman

The Sakdalistas focused on moral language in their writings while the Communists used a more economic-oriented tone

In Philippine historiography, there has been a tendency to either classify political movements using rigid and “elite” categories (fanatical vs...

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02 Jan 2024

UP Diliman

Researchers develop first marine plastics pollution database in Southeast Asia

The Southeast Asian region has been consistently tagged as among the top polluters of plastic in the oceans, with the...

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02 Jan 2024

UP Los Baños

Despite having positive views about queering English language teaching, teachers report limited knowledge of queer concepts

In the last two decades, there has been an increasing acknowledgement of and interest in the role of education in...

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29 Nov 2023

UP Manila

“No home birthing” policy affected the social and economic status of hilots and the well-being of mothers in a community

The paper aims to document the ways people understand, practice and experience pregnancy and childbirth in a community in Batangas,...

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24 Nov 2023

UP Diliman

Filipino women exposed to violence between their parents are likely to be both a perpetrator and a victim of intimate partner violence

Violence can be transferred from one generation to another through social learning. Social learning theory posits that behaviors and values...

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22 Nov 2023

UP Diliman

Children’s writers can present issues to young readers through words, linguistic structures and literary devices

This research focuses on the analysis of five stories for children written by Filipino authors and published in the Philippines...

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17 Nov 2023

UP Los Baños

Study looks at how Filipino researchers write articles in Philippine English and its implications for academic writing

For over half a century, Philippine English has existed as a linguistic issue in the Philippines. Despite the numerous studies...

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Research

In classical guitar performances, various plucking gestures can be employed to evoke different tonal qualities in the produced sound. To investigate these gestural parameters and tonal variations, we classify two main plucking techniques, namely the apoyando and the tirando, along with their corresponding variations, from the audio and the video of a classical guitar performance. From the video signal, we extract right-hand gestural parameters using a hand keypoint detection model which locates twenty-one landmarks corresponding to the joints of the right hand. We achieved an average classification accuracy of 92.5% after building a model from our data set containing the images at the plucking onsets. Moreover, the model can accurately classify even on the succeeding frames after the onset, and we can achieve comparable accuracy even under various camera perspectives provided that the data set fall under the same camera perspective. From the audio signal, we achieved an average accuracy of 88.61% by extracting relevant features from the audio signals. We believe that these models can potentially be used as a pedagogical tool in learning how to properly and correctly perform these various plucking techniques.

This research allows us to understand how the classical guitarist’s performance gestures relate with the produced tone. By analyzing and processing the audio and the video of a classical guitar performance, we can infer the specific technique employed by the guitarists using machine learning. This is particularly helpful for tone production pedagogy since instrumental techniques in producing a certain desired tone vary among classical guitarists due to their physiological differences. Consequently, classical guitarists resort to the experimentation method of finding the desired tone. By adopting an objective and quantitative approach through multimedia signal processing, we can supplement and support the pedagogues in providing feedback to their guitar students with regards to tone production.

Authors: Carl Timothy Tolentino and Franz De Leon (Electrical and Electronics Engineering Institute, University of the Philippines Diliman)

Read the full paper: https://ieeexplore.ieee.org/document/10376130