Harmonic-Frontier-Audio/Vocal_Fry_and_Subharmonic_Phonation_Preview

Harmonic Frontier Audio – Vocal Fry and Subharmonic Phonation (Preview, v0.9)

A high-fidelity human vocal dataset designed for AI training, speech research, and expressive voice modeling.

Vocal Fry and Subharmonic Phonation (Preview), created by Harmonic Frontier Audio, provides a compact reference set demonstrating the quality, formatting, and metadata conventions used in the Harmonic Frontier Audio Human Vocality Primitives series.

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🔎 Summary

This dataset provides high-quality, rights-cleared recordings of vocal fry, creak phonation, and controlled subharmonic behaviors — physiological and speech-adjacent low-frequency phonation regimes captured as non-musical acoustic primitives.

The full dataset encompasses:

• steady and variable vocal fry
• light and dense creak phonation
• controlled and unstable subharmonic phonation
• low-register and mid-low boundary-zone behaviors
• gradual modal → vocal fry transitions
• gradual vocal fry → modal transitions
• light modal anchors for comparative reference
• stable and intentionally variable low-frequency pulse structures

These characteristics make the dataset valuable for AI speech and voice modeling, phonetics research, phonation classification, low-frequency pulse modeling, register-boundary modeling, voice synthesis, and human-aligned vocal control systems.

Developed by Harmonic Frontier Audio, this preview follows The Proteus Standard™ for dataset provenance, transparency, and ethical AI use.
Learn more about the Proteus Standard → https://harmonicfrontieraudio.com/proteus-standard

Full dataset details and licensing information are available at:
https://harmonicfrontieraudio.com/datasets/vocal-fry-subharmonic-phonation

If you find this dataset useful, please consider giving it a 🤍 on Hugging Face to help others discover it.

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🔉 About Vocal Fry and Subharmonic Phonation

Vocal fry is a low-frequency phonation regime characterized by discrete, often irregular vocal-fold pulses and prominent creak-like periodicity. Creak phonation occupies a related physiological space, ranging from lighter creaky texture to denser pulse patterns.

Subharmonic phonation introduces stable or unstable multi-period behavior in which energy appears below or between the dominant harmonic relationships of ordinary modal voicing. In this HVP dataset, these behaviors are treated as physiological and speech-adjacent phenomena rather than musical techniques.

The dataset also captures gradual transitions between light modal voicing and vocal fry in both directions, along with light modal anchors in the same register zones for comparison.

These phenomena are foundational to:

• phonation-type and voice-quality classification
• speech and expressive voice synthesis
• modeling low-frequency pulse structure and periodicity
• register-boundary and phonation-transition modeling
• acoustic study of creak, fry, and subharmonic behavior
• comparative analysis of modal and non-modal voicing

This dataset presents a neutral, non-linguistic, non-performative representation of vocal fry, creak, and subharmonic phonation.
It is not designed as a collection of musical growls, throat singing, or stylized subharmonic performance, but rather to isolate acoustic primitives underlying physiological low-frequency voicing and transitions between phonation regimes.

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📂 Contents

Audio Files (.wav)

• Recorded at 96 kHz / 24-bit WAV format
• Exported as mono
• Fade-ins and fade-outs of 3–5 ms applied for consistency
• No compression, normalization, or creative processing applied
• High-pass filtered at ~40 Hz to remove subsonic rumble

This preview includes 3 representative audio files, selected to demonstrate:

• low-register steady vocal fry with a stable pulse pattern and prominent creak-like periodicity
• mid-register controlled subharmonic phonation with an audible subharmonic component and stable multi-period patterning
• a low-register modal → vocal fry transition with increasing pulse irregularity and low-frequency emphasis

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Metadata (.csv)

Includes structured fields for:

• file name
• sound source type
• airflow type
• phonation type
• gesture and articulation descriptors
• microphone and recording chain
• sample rate, bit depth, and dataset version

Metadata follows the Harmonic Frontier Audio – Foundations schema.

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🎤 Recording Notes

• Recorded in a treated studio environment using a single-mic setup:
  • Microphone: Rode NT1-A condenser microphone
  • Recording chain: Rode NT1-A → Zoom F8n Pro
• Captured at 96 kHz / 32-bit float, rendered as 96 kHz / 24-bit mono WAV for release.
• Performer positioned approximately 3.5 inches from the microphone, with the microphone approximately 10–15 degrees off-axis.
• Sustained fry, creak, subharmonic, and modal-anchor conditions were recorded at approximately 5–7 seconds; transitions were approximately 7–9 seconds with a smooth, gradual shift.
• Exact pitches were not prescribed; performances used a low register and a mid-low boundary zone, labeled mid in the metadata.
• Mouth shape, posture, and microphone distance were kept consistent to preserve meaningful differences in pulse structure and phonation regime.

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🌈 Spectrogram Preview

Below is a spectrogram illustrating the low-frequency pulse structure, altered periodicity, subharmonic energy, and changing harmonic organization characteristic of vocal fry, creak, controlled subharmonic phonation, and transitions between modal and fry regimes:

⚡ Usage

This preview pack is designed for:

• Evaluation of Harmonic Frontier Audio dataset quality and structure
• Testing AI and DSP systems that model vocal fry, creak, subharmonics, pulse structure, and phonation transitions
• Research in phonetics, speech synthesis, voice-quality classification, and non-modal phonation
• Creative and technical applications requiring physiological low-frequency vocal textures and controlled phonation boundaries

👉 Note: This is not a full dataset.
The complete Vocal Fry and Subharmonic Phonation dataset includes steady and variable fry, light and dense creak, controlled and unstable subharmonic phonation across low and mid-low register zones, bidirectional modal/fry transitions, and light modal anchors, and is available for licensing.

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💡 Full Dataset Availability

This is a preview pack of the Vocal Fry and Subharmonic Phonation Dataset.
The complete dataset is available for commercial licensing.

For licensing inquiries:
📩 info@harmonicfrontieraudio.com

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📥 How to Use This Dataset in Python

You can load the Parquet-converted version of this dataset directly with the datasets library:

from datasets import load_dataset

dataset = load_dataset(
    "Harmonic-Frontier-Audio/Vocal_Fry_and_Subharmonic_Phonation_Preview",
    split="train"
)

print(dataset)

⚙️ Note: Parquet conversion and load_dataset() support will be available within 2–3 days of publication.

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🔗 Explore More from Harmonic Frontier Audio

• Human Vocality Primitives Series (Previews)
• Celtic Constellation Series (Previews)
• Extended Vocal Techniques Spectrum (Previews)
• Novelty Gems Cabinet (Previews)

(All datasets follow The Proteus Standard™ for ethical dataset provenance and licensing.)

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📜 License

Released under CC BY-NC 4.0.

• Free for non-commercial use, testing, and research
• Commercial licensing available via Harmonic Frontier Audio
• A formal rights declaration is included in this dataset bundle

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📧 Contact

Harmonic Frontier Audio
📩 info@harmonicfrontieraudio.com
🌐 https://harmonicfrontieraudio.com/

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🗒️ Release Notes

Version 0.9 (March 2026) – Initial Preview Pack release for Vocal Fry and Subharmonic Phonation.
See CHANGELOG.md for detailed version history.

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Citation

If you use this dataset in your research, please cite:

Pullen, B. (2026). Vocal Fry and Subharmonic Phonation Dataset (Preview) [Data set]. Harmonic Frontier Audio. Zenodo. https://doi.org/10.5281/zenodo.21989597

ORCID: https://orcid.org/0009-0003-4527-0178

BibTeX

@dataset{pullen_2026_vocalfryandsubharmonicphonation_preview,
  author       = {Blake Pullen},
  title        = {Vocal Fry and Subharmonic Phonation Dataset (Preview)},
  year         = {2026},
  publisher    = {Harmonic Frontier Audio},
  version      = {0.9},
  doi          = {10.5281/zenodo.21989597},
  url          = {https://doi.org/10.5281/zenodo.21989597}
}