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CHANGELOG.md

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+# Changelog – Harmonic Frontier Audio: Vocal Fry and Subharmonic Phonation (Preview Pack)
+
+## v0.9 – March 2026
+- Initial release of the **Vocal Fry and Subharmonic Phonation Preview Pack**
+- Includes a curated subset of vocal fry, creak, and controlled subharmonic phonation, representing stable and variable low-frequency pulse structures, modal/fry transitions, and light modal reference anchors
+- Recorded in a treated private studio environment using a **Rode NT1-A microphone → Zoom F8n Pro** signal chain
+- Captured at **96 kHz / 32-bit float** and exported as **96 kHz / 24-bit mono WAV**
+- 3–5 ms fade-ins and fade-outs applied for consistency; no normalization, compression, or creative post-processing used
+- Non-lexical, non-semantic vocal material focused on acoustic primitives rather than linguistic content
+- Metadata sheet, README documentation, and rights declaration included

HFA_HVP_VocalFrySubharmonicPreview_Metadata.csv

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+file_name,sound_source_type,instrument,airflow_type,phonation_type,content,note_pitch,articulation_type,gesture_type,vibrato,bpm,mic,channels,sample_rate_hz,bit_depth,record_chain,version
+HFA_HVP_VocalFrySubharmonic_Physiological_VocalFry_Low_Steady_Take_1.wav,human_voice,voice,pulmonic_egressive,vocalfry,Vocal fry — low register — steady fry. Low-register vocal fry with stable pulse pattern and prominent creak-like periodicity.,low,sustained,sustain,none,,Rode NT1-A,1,96000,24,Rode NT1-A -> Zoom F8n Pro,v0.9
+HFA_HVP_VocalFrySubharmonic_Physiological_Subharmonic_Mid_Controlled_Take_1.wav,human_voice,voice,pulmonic_egressive,subharmonic,Subharmonic phonation — mid register — controlled subharmonic. Subharmonic voicing with audible subharmonic component and stable multi-period patterning.,mid,sustained,sustain,none,,Rode NT1-A,1,96000,24,Rode NT1-A -> Zoom F8n Pro,v0.9
+HFA_HVP_VocalFrySubharmonic_Physiological_Transition_ModalToFry_Low_Take_1.wav,human_voice,voice,pulmonic_egressive,modal_to_vocal_fry,Phonation transition — modal → vocal fry — low register. Transition from light modal voicing into vocal fry with increasing pulse irregularity and low-frequency emphasis.,low,sustained,transition,none,,Rode NT1-A,1,96000,24,Rode NT1-A -> Zoom F8n Pro,v0.9

README.md

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 ---
+pretty_name: Vocal Fry and Subharmonic Phonation (Preview)
 license: cc-by-nc-4.0
+size_categories: [n<1K]
+tags:
+  - audio
+  - dataset
+  - vocals
+  - vocal_fry
+  - creak_phonation
+  - subharmonic_phonation
+  - phonation_transitions
+  - human_voice
+  - human_vocality_primitives
+  - speech_research
+  - phonetics
+  - sound_design
+  - ai_training_data
+  - sampling_96khz
+  - bitdepth_24bit
+  - mono
+task_categories: [other]
+language: [und]
+thumbnail: thumbnail.png
+description: "Low-register fry, creak, and controlled subharmonic behaviors."
 ---
+
+![Dataset Thumbnail](./thumbnail.png)
+
+# 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.
+
+---
+
+## 🔎 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.
+
+---
+
+## 🔉 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.
+
+---
+
+## 📂 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
+
+---
+
+### 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.
+
+---
+
+## 🎤 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.
+
+---
+
+## 🌈 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:
+
+![Spectrogram Preview](Spectrogram_Preview.png)
+
+## ⚡ 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.
+
+---
+
+## 💡 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
+
+---
+
+## 📥 How to Use This Dataset in Python
+
+You can load the Parquet-converted version of this dataset directly with the `datasets` library:
+
+```python
+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.*
+
+---
+
+## 🔗 Explore More from Harmonic Frontier Audio
+
+- [Human Vocality Primitives Series (Previews)](https://huggingface.co/collections/Harmonic-Frontier-Audio/human-vocality-primitives-previews)
+- [Celtic Constellation Series (Previews)](https://huggingface.co/collections/Harmonic-Frontier-Audio/celtic-constellation-previews)
+- [Extended Vocal Techniques Spectrum (Previews)](https://huggingface.co/collections/Harmonic-Frontier-Audio/extended-vocal-techniques-spectrum-previews)
+- [Novelty Gems Cabinet (Previews)](https://huggingface.co/collections/Harmonic-Frontier-Audio/novelty-gems-cabinet-previews)
+
+*(All datasets follow The Proteus Standard™ for ethical dataset provenance and licensing.)*
+
+---
+
+## 📜 License
+
+Released under **[CC BY-NC 4.0](https://creativecommons.org/licenses/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
+
+---
+
+## 📧 Contact
+
+Harmonic Frontier Audio  
+📩 info@harmonicfrontieraudio.com  
+🌐 https://harmonicfrontieraudio.com/
+
+---
+
+## 🗒️ Release Notes
+
+**Version 0.9 (March 2026)** – Initial Preview Pack release for Vocal Fry and Subharmonic Phonation.  
+See `CHANGELOG.md` for detailed version history.
+
+---
+
+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
+
+```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}
+}
+```

RightsDeclaration.txt

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+Harmonic Frontier Audio – Rights Declaration
+--------------------------------------------
+
+All recordings contained in this dataset were created by Blake Pullen,
+performer and producer, in March 2026 under the Harmonic Frontier Audio brand.
+
+- Performer: Blake Pullen
+- Vocal Technique: Vocal Fry and Subharmonic Phonation
+- Recording Location: Private studio, Las Vegas, Nevada
+- Recording Dates: March 2026
+
+No third-party performers, copyrighted works, or external samples are included.
+All material consists of original, non-lexical vocal performances created
+specifically for this dataset.
+
+These recordings capture vocal fry, creak phonation, controlled subharmonic behaviors, modal-to-fry and fry-to-modal transitions, and related low-frequency phonation gestures.
+They do not contain semantic speech content and are not derived from, or
+representative of, any spoken language.
+
+Harmonic Frontier Audio (HFA) is the sole copyright owner of these recordings
+and associated metadata. This dataset is free of encumbrances and may be
+licensed by Harmonic Frontier Audio under the terms stated in the accompanying
+README documentation.

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