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CHANGELOG.md

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+# Changelog – Harmonic Frontier Audio: Subharmonic Phonation / Vocal Fry (Preview Pack)
+
+## v0.9 – November 2025
+- Initial release of the **Overtone Singing Preview Pack**
+- Includes: sustained fundamental tones with harmonic intervals, arpeggios, scales, glissandi, and a short original melodic exercise demonstrating transitions between harmonics
+- Recorded in a treated studio environment using a Rode NT1-A microphone → Zoom F8n Pro signal chain
+- Captured at 96kHz / 32-bit float and exported as 96kHz / 24-bit mono WAV
+- 3–5 ms fade-ins and fade-outs applied for transient consistency; no normalization or post-processing used
+- Non-lexical, culturally neutral representation of the overtone singing technique, referencing traditions such as Tuvan and Mongolian throat singing and Tibetan Chant but not imitating any specific style
+- Metadata sheet, README documentation, and rights declaration included

Demos/OvertoneSinging_Demotrack_Master.mp3

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HFA_OvertoneSinging_Preview_Metadata.csv

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+file_name,instrument,content,note_pitch,gesture_type,harmonic_numbers,harmonic_pitches,vibrato,bpm,mic,channels,sample_rate_hz,bit_depth,record_chain,version,note_pitch_machine
+HFA_OvertoneSinging_Sustain_B3_Interval_h4toh5.wav,Human voice (overtone singing),Overtone singing — sustained fundamental B3; harmonics 4–5 interval.,B3,Interval,4-5,h4: 987.77 Hz; h5: 1234.71 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,B3
+HFA_OvertoneSinging_Sustain_A3_Interval_h5toh6.wav,Human voice (overtone singing),Overtone singing — sustained fundamental A3; harmonics 5–6 interval.,A3,Interval,5-6,h5: 1100.00 Hz; h6: 1320.00 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,A3
+HFA_OvertoneSinging_Sustain_Bflat3_Interval_h6toh7.wav,Human voice (overtone singing),Overtone singing — sustained fundamental Bflat3; harmonics 6–7 interval.,B♭3,Interval,6-7,h6: 1398.49 Hz; h7: 1631.57 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,Bflat3
+HFA_OvertoneSinging_Sustain_G3_Interval_h6toh7.wav,Human voice (overtone singing),Overtone singing — sustained fundamental G3; harmonics 6–7 interval.,G3,Interval,6-7,h6: 1175.99 Hz; h7: 1371.98 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,G3
+HFA_OvertoneSinging_Sustain_A3_Arpeggio_h4_h5_h6.wav,Human voice (overtone singing),Overtone singing — sustained fundamental A3; harmonics 4–5–6 arpeggio.,A3,Arpeggio,4-5-6,h4: 880.00 Hz; h5: 1100.00 Hz; h6: 1320.00 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,A3
+HFA_OvertoneSinging_Sustain_C4__Arpeggio_h3_h4_h5.wav,Human voice (overtone singing),Overtone singing — sustained fundamental C4; harmonics 3–4–5 arpeggio.,C4,Arpeggio,3-4-5,h3: 784.88 Hz; h4: 1046.50 Hz; h5: 1308.13 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,C4
+HFA_OvertoneSinging_Sustain_Eflat4_Arpeggio_h3_h4_h5.wav,Human voice (overtone singing),Overtone singing — sustained fundamental Eflat4; harmonics 3–4–5 arpeggio.,E♭4,Arpeggio,3-4-5,h3: 933.38 Hz; h4: 1244.51 Hz; h5: 1555.63 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,Eflat4
+HFA_OvertoneSinging_Sustain_F3_Scale_h8_h9_h10.wav,Human voice (overtone singing),Overtone singing — sustained fundamental F3; harmonics 8–9–10 scale.,F3,Scale,8-9-10,h8: 1396.91 Hz; h9: 1571.53 Hz; h10: 1746.14 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,F3
+HFA_OvertoneSinging_Sustain_A3_Scale_h6_h7_h8.wav,Human voice (overtone singing),Overtone singing — sustained fundamental A3; harmonics 6–7–8 scale.,A3,Scale,6-7-8,h6: 1320.00 Hz; h7: 1540.00 Hz; h8: 1760.00 Hz,False,64.0,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,A3
+HFA_OvertoneSinging_Sustain_D4_Glissando_h3toh8.wav,Human voice (overtone singing),Overtone singing — sustained fundamental D4; harmonics 3–8 glissando.,D4,Glissando,3-8,h3: 880.99 Hz; h8: 2349.32 Hz,False,,Rode NT1-A,1,96000,24,Zoom F8n Pro; Rode NT1-A,v0.9-preview,D4

README.md

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+pretty_name: Overtone Singing (Preview)
+license: cc-by-nc-4.0
+size_categories: [n<1K]
+tags:
+  - audio
+  - music
+  - dataset
+  - vocals
+  - overtone_singing
+  - harmonic_singing
+  - khoomei
+  - throat_singing
+  - extended_vocal_techniques
+  - world_music
+  - folk_vocals
+  - acoustic_voice
+  - ethnomusicology
+  - sound_design
+  - expressive_voice
+  - ai_training_data
+  - sampling_96khz
+  - bitdepth_24bit
+  - mono
+task_categories: [other]
+language: [und]
+thumbnail: thumbnail.png
+description: "A high-fidelity vocal dataset demonstrating overtone singing — a complex extended vocal technique found in multiple world singing traditions — designed for AI training, music research, and creative sound development."
+---
+
+![Dataset Thumbnail](./thumbnail.png)
+
+# Harmonic Frontier Audio – Overtone Singing (Preview, v0.9)
+
+**A high-fidelity vocal dataset designed for AI training, music research, and creative sound development.**
+
+**Overtone Singing (Preview)**, created by **Harmonic Frontier Audio**, provides a compact reference set demonstrating the quality, formatting, and metadata conventions used in the Harmonic Frontier Audio *Extended Vocal Techniques Spectrum*.
+
+---
+
+### 🔎 Summary
+
+This dataset provides high-quality, rights-cleared audio recordings for use in **AI training, music research, and sound design**, capturing the extraordinary vocal phenomenon known as **overtone singing** (also called *harmonic singing* or *Khoomei*).  
+In overtone singing, the vocalist isolates and amplifies specific harmonics above a sustained fundamental pitch, producing the perception of two or more distinct tones simultaneously.
+
+Developed by **Harmonic Frontier Audio**, this dataset follows *The Proteus Standard™* for dataset provenance and ethical AI use.  
+It provides researchers, developers, and musicians with clean, controlled examples of overtone production for applications in **voice synthesis**, **spectral modeling**, and **cross-cultural timbre analysis**.
+
+---
+
+## 🎶 About Overtone Singing
+
+**Overtone singing** is one of the world’s most striking and acoustically fascinating vocal arts.  
+Practitioners manipulate the shape of the vocal tract to filter and emphasize individual harmonics, creating the illusion of multiple pitches from a single voice.  
+
+While it is best known from **Tuvan** and **Mongolian** traditions (such as *Khoomei*, *Sygyt*, and *Kargyraa*), variations of overtone singing appear across many cultures — including Tibetan chant, Sardinian *cantu a tenore*, and modern Western overtone choirs.
+
+This dataset presents a **neutral, non-traditional representation** of overtone singing.  
+It is designed not to imitate any specific cultural style but to serve as a **technical and expressive study** of harmonic isolation and control — useful for both acoustic analysis and generative modeling of the human voice.
+
+If you find this dataset useful, please consider giving it a 🤍 on Hugging Face to help others discover it.
+
+---
+
+## 📂 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 transient consistency  
+- DC offset minimized and normalized to maintain consistent loudness  
+- No compression, normalization, or external processing applied  
+- High-pass filtered at ~40 Hz to remove subsonic rumble  
+
+### Categories in this Preview
+1. **Sustained Fundamentals**
+   - Long tones on single fundamentals with isolated harmonics
+2. **Harmonic Intervals**
+   - Alternation between two harmonics within a sustained fundamental
+3. **Arpeggio Gestures**
+   - Sequential harmonic articulations forming triadic or scalar structures
+4. **Glissando**
+   - Continuous overtone sweeps across the harmonic series
+5. **Short Melodic Exercise**
+   - Simple original melody emphasizing controlled harmonic shifts and transitions
+
+---
+
+**Metadata (.csv)**  
+Includes structured fields for file name, category, content, fundamental pitch, harmonic numbers and pitches, microphone, channel configuration, sample rate, bit depth, recording chain, and dataset version.
+
+---
+
+## 🎤 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  
+- Recorded at **96 kHz / 32-bit float**, rendered as **96 kHz / 24-bit** mono WAV for release.  
+- Room tone and subtle breath noise were preserved to retain the natural acoustic realism of overtone production.
+
+---
+
+## 🌈 Spectrogram Preview
+
+Below is a spectrogram showing the clear separation of harmonic peaks above the sustained fundamental pitch, characteristic of overtone singing:
+
+![Spectrogram Preview](Spectrogram_Preview.png)
+
+---
+
+## 🎧 Listen – Demonstration Track
+
+Below is a short mixed and mastered music example featuring this dataset in context.  
+It illustrates how **Overtone Singing (Preview)** can be integrated into a musical arrangement, highlighting both its resonant fundamentals and harmonic overtones.
+
+<audio controls style="width:100%;">
+  <source src="https://huggingface.co/datasets/Harmonic-Frontier-Audio/Overtone_Singing_Preview/resolve/main/Demos/OvertoneSinging_DemoTrack_Master.mp3" type="audio/mpeg">
+  Your browser does not support the audio element.
+</audio>
+
+🎵 **Track:** “Overtone Example”  
+🎚️ **Composer / Producer:** Blake Pullen  
+📦 **Source:** Harmonic Frontier Audio – *Overtone Singing (Preview)*  
+
+📜 *This track is provided for demonstration purposes only and is not part of the dataset.  
+It may not be used for AI training, redistribution, or derivative works.*
+
+🪶 *The instrumental accompaniment was generated using Suno’s Pro plan under a commercial license.  
+All vocal performances and featured dataset sounds were performed, recorded, and produced by Blake Pullen for Harmonic Frontier Audio.*
+
+---
+
+## ⚡ Usage
+
+This preview pack is designed for:
+- **Evaluation** of Harmonic Frontier Audio dataset structure and fidelity  
+- **Testing** AI and DSP systems that model or classify harmonic timbres  
+- **Creative sound design** and **extended voice synthesis** research  
+
+👉 Note: This is **not a full dataset**.  
+The complete Harmonic Frontier Audio dataset for **Overtone Singing** will include:
+- Expanded harmonic and vowel variations  
+- Dynamic overtone transitions and melodic gestures  
+- Additional tuning modes and glissando articulations  
+
+---
+
+## 💡 Full Dataset Availability
+
+This is a **preview pack** of the *Overtone Singing Dataset*.  
+The complete dataset — with extended harmonic content and melodic variation — will be available for **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/Overtone_Singing_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
+
+- [Subharmonic Phonation / Vocal Fry (Preview)](https://huggingface.co/datasets/Harmonic-Frontier-Audio/Subharmonic_Phonation_Vocal_Fry_Preview)
+- [Whisper Phonation (Preview)](https://huggingface.co/datasets/Harmonic-Frontier-Audio/Whisper_Phonation_Preview)
+- [Falsetto (Preview)](https://huggingface.co/datasets/Harmonic-Frontier-Audio/Falsetto_Preview)
+- [Vocal Percussion (Preview)](https://huggingface.co/datasets/Harmonic-Frontier-Audio/Vocal_Percussion_Preview)
+
+*(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/
+
+---
+
+## 🔮 Future Roadmap
+
+This preview release is part of the **Harmonic Frontier Audio – Extended Vocal Techniques Spectrum**.  
+Upcoming planned datasets include:
+
+- **Whisper Phonation**  
+- **Falsetto**  
+- **Vocal Percussion**  
+- **Growl / Metal Vocals**  
+- **Subharmonic Phonation / Vocal Fry (Full Dataset)**
+
+Over time, Harmonic Frontier Audio will expand the Extended Vocal Techniques Spectrum alongside its Folk & World Instrument catalogs — creating the first unified library of ethical, rights-cleared world and human vocal datasets for AI training, synthesis, and sound design.
+
+---
+
+## 🗒️ Release Notes
+
+**Version 0.9 (Nov. 2025)** – Initial Preview Pack release for Overtone Singing.  
+See `CHANGELOG.md` for detailed version history.
+
+---
+
+## Citation
+
+If you use this dataset in your research, please cite:
+
+Pullen, B. (2025). *Overtone Singing Dataset (Preview)* [Data set]. Harmonic Frontier Audio. Zenodo.  
+https://doi.org/10.5281/zenodo.17812972  
+
+ORCID: [https://orcid.org/0009-0003-4527-0178](https://orcid.org/0009-0003-4527-0178)
+
+### BibTeX
+```bibtex
+@dataset{pullen_2025_overtone_preview,
+  author       = {Blake Pullen},
+  title        = {Overtone Singing Dataset (Preview)},
+  year         = {2025},
+  publisher    = {Harmonic Frontier Audio},
+  version      = {0.9},
+  doi          = {10.5281/zenodo.17812972},
+  url          = {https://doi.org/10.5281/zenodo.17812972}
+}
+```

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 Nov. 2025 under the Harmonic Frontier Audio brand.
+
+- Performer: Blake Pullen
+- Vocals: Overtone Singing
+- Recording Location: Private studio, Las Vegas, Nevada
+- Recording Dates: Nov. 2025
+
+No third-party performers, copyrighted works, or external samples are included.  
+All material consists of original vocal performances of public domain exercises, 
+sustained tones, and a newly composed melody written by Blake Pullen.
+
+All vocalizations are non-lexical 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.