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Related Experiment Video

Updated: Jun 1, 2025

Author Spotlight: Advancements in the Fabrication of Synthetic Vocal Fold Models for Phonetic and Robotic Applications
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STRAIGHTMORPH: A Voice Morphing Tool for Research in Voice Communication Sciences.

P Belin1, H Kawahara2

  • 1Institut de Neurosciences de la Timone, Aix-Marseille-University, Marseille, Provence-Alpes-Côte d'Azur, UMR7289 CNRS, France.

Open Research Europe
|January 17, 2025
PubMed
Summary

STRAIGHTMORPH is a new MATLAB tool for creating high-quality voice morphs. It allows researchers to generate controlled voice continua for various applications.

Keywords:
voice; voice conversion; morphing; voice identity; voice affect; animal vocalizations

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Area of Science:

  • Acoustic Phonetics
  • Speech Synthesis
  • Computational Linguistics

Background:

  • Voice morphing is crucial for speech synthesis and analysis.
  • Existing tools may lack parametric control or ease of use.
  • High-quality, controllable voice manipulation is needed for research.

Purpose of the Study:

  • To introduce STRAIGHTMORPH, an efficient voice morphing tool for the scientific community.
  • To provide a tutorial with examples for using STRAIGHTMORPH.
  • To enable the generation of parametrically controlled voice continua.

Main Methods:

  • Extraction of 'mObjects' from voice samples using accurate fundamental frequency tracking.
  • Manual definition of corresponding time and frequency anchors across samples.
  • Parametric combination of 'mObjects' to synthesize novel voice stimuli.

Main Results:

  • STRAIGHTMORPH generates high-quality, parametrically controlled voice morphs.
  • The tool facilitates the creation of continua for gender, identity, and emotion.
  • It enables random combinations of voice characteristics.

Conclusions:

  • STRAIGHTMORPH is a versatile and efficient tool for voice morphing.
  • It simplifies the creation of high-quality synthetic voice stimuli.
  • The tool supports advanced research in speech perception and synthesis.