README.md

---
pretty_name: Modal Phonation (Preview)
license: cc-by-nc-4.0
size_categories: [n<1K]
tags:
  - audio
  - dataset
  - vocals
  - modal_phonation
  - sustained_vowels
  - vocal_onsets
  - 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: "Steady, natural vocal tone across pitch, amplitude, and sustained vowel sets."
---

![Dataset Thumbnail](./thumbnail.png)

# Harmonic Frontier Audio – Modal Phonation (Preview, v0.9)

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

**Modal 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 **neutral modal phonation** — steady, naturally voiced vocal behaviors captured across systematic variations in register, vowel configuration, amplitude, and onset character.

The full dataset encompasses:
- sustained modal vowels across low, mid, and high register zones
- open, mid-front, high-front, mid-back rounded, and high-back rounded vowel configurations
- soft, neutral, and firm amplitude levels
- stable pitch centers with consistent harmonic structure
- gentle and clear modal onset controls across low, mid, and high registers
- neutral vocal production without stylistic coloration

These characteristics make the dataset valuable for **AI speech and voice modeling**, **phonetics research**, **voice synthesis**, **phonation classification**, **vowel and register modeling**, **onset modeling**, 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/modal-phonation

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

---

## 🎙️ About Modal Phonation

**Modal phonation** is the ordinary, efficiently voiced register used as a primary baseline for human vocal production. It is characterized by regular vocal-fold vibration, stable harmonic structure, and a naturally balanced relationship between airflow and vocal-fold engagement.

In this dataset, modal phonation is systematically represented across **low, mid, and high register zones**, five broad vowel configurations, and three amplitude levels. Separate onset controls provide additional examples of gentle and clear initiation into otherwise steady modal voicing.

These phenomena are foundational to:
- baseline speech and voice synthesis
- phonation-type and vocal-register classification
- vowel and formant-aware modeling
- amplitude-conditioned voice generation
- onset and attack modeling
- comparative study of non-modal and extended vocal behaviors

This dataset presents a **neutral, non-linguistic, non-performative representation** of modal phonation.  
It is not designed to encode semantic speech content or musical performance, but rather to isolate **acoustic primitives** underlying stable natural voicing, vowel resonance, amplitude variation, and onset behavior.

---

## 📂 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 **4 representative audio files**, selected to demonstrate:
- **low-register open-vowel modal phonation** at soft amplitude
- **mid-register mid-front-vowel modal phonation** at firm amplitude
- **high-register high-front-vowel modal phonation** at neutral amplitude
- a **low-register gentle modal onset** followed by stable modal voicing

---

### 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 modal vowels were recorded at approximately **6–8 seconds**, with onset controls approximately **4–6 seconds**.
- Exact pitches were not prescribed; performances were organized by **low, mid, and high register zones**.
- Stable pitch centers, consistent harmonic structure, and neutral vocal quality were preserved without stylistic coloration.

---

## 🌈 Spectrogram Preview

Below is a spectrogram illustrating the stable harmonic structure, vowel-dependent resonance patterns, and controlled onset behavior characteristic of neutral modal phonation across register and amplitude conditions:

![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 modal voicing, vowel resonance, amplitude, and onset behavior  
- Research in phonetics, speech synthesis, phonation classification, and vocal-register modeling  
- Creative and technical applications requiring clean, neutral sustained vocal primitives  

👉 **Note:** This is **not a full dataset**.  
The complete **Modal Phonation** dataset includes a substantially larger matrix of sustained vowel primitives spanning five vowel configurations, three register zones, and soft/neutral/firm amplitudes, together with gentle and clear onset controls across low, mid, and high registers, and is available for licensing.

---

## 💡 Full Dataset Availability

This is a **preview pack** of the *Modal 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/Modal_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 Modal Phonation.  
See `CHANGELOG.md` for detailed version history.

---

Citation

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

Pullen, B. (2026). Modal Phonation Dataset (Preview) [Data set]. Harmonic Frontier Audio. Zenodo.
https://doi.org/10.5281/zenodo.21989299

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

### BibTeX

```bibtex
@dataset{pullen_2026_modalphonation_preview,
  author       = {Blake Pullen},
  title        = {Modal Phonation Dataset (Preview)},
  year         = {2026},
  publisher    = {Harmonic Frontier Audio},
  version      = {0.9},
  doi          = {10.5281/zenodo.21989299},
  url          = {https://doi.org/10.5281/zenodo.21989299}
}
```