Harmonic-Frontier-Audio/Celtic_Stems_Reference_Sessions_Preview

Harmonic Frontier Audio – Celtic Constellation Reference Sessions (Preview, v0.9)

A high-fidelity music-production dataset designed to connect isolated source performances, production processing, arrangement context, and finished musical outcomes.

Celtic Constellation Reference Sessions (Preview), created by Harmonic Frontier Audio, introduces the Reference Sessions product vertical through a compact proof-of-concept built around purpose-recorded Celtic ensemble material.

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🔎 Summary

Reference Sessions are structured music-production datasets that connect multiple representations of the same musical performance:

Dry source performance → Processed stem → Finished mix

Rather than functioning simply as a multitrack sample pack, Reference Sessions are designed around the relationships between aligned source material and production outcomes. Full releases pair complete musical arrangements with full-length, sample-aligned dry stems and the corresponding processed stems used to construct the finished mixes.

The Celtic Constellation Reference Sessions concept applies this architecture to traditional Celtic instrumentation and arrangement practice. The envisioned full dataset draws primarily from:

• Smallpipes in A
• Irish Tin Whistle
• Irish Low Whistle
• Uilleann Pipes
• Bodhrán

The full product architecture is intended to encompass approximately 10 core musical arrangements, each explored in both traditional and contemporary production styles, with additional arrangement variants that feature different lead instruments independently. Each arrangement family is designed to include:

• finished mixed and mastered tracks
• full-length processed stems using the production treatment heard in the corresponding mix
• full-length dry stems preserving the underlying source performances
• sample-aligned timelines across representations
• tempo, key/tonal-center, arrangement, source-lineage, and recording metadata

The exact number of files and variants may differ by arrangement and final release design.

These relationships make Reference Sessions valuable for music-generation and arrangement modeling, source-separation and stem modeling, mix and production transformation research, instrument-context modeling, training systems to relate isolated performances to ensemble outcomes, and conventional production or reference applications.

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 commercial licensing information will be available through Harmonic Frontier Audio as the Reference Sessions product line develops.

If you find this proof of concept useful, please consider giving it a 🤍 on Hugging Face to help demonstrate market interest in the Reference Sessions format.

Watch: Celtic Constellation series overview (65 seconds) https://www.youtube.com/watch?v=2ctPQmTS-4g

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🎚️ About Reference Sessions

Many audio datasets isolate sounds from their musical context. Reference Sessions are designed to preserve both sides of that relationship.

Each full session begins with purpose-recorded source performances and follows them through production into complete musical arrangements. The dry stems preserve the underlying performances; processed stems preserve the track-level production treatment; and the finished mixes demonstrate how those sources function together in an arranged and mastered musical context.

Because these representations share a common timeline, the dataset can support analysis and modeling of relationships such as:

• dry performance → processed instrument sound
• isolated stem → ensemble placement
• source performance → alternate arrangement style
• instrument combination → finished musical texture
• track-level processing → mix outcome

Processed stems are intended to contain the same track-level processing used in the finished arrangement, so that their combination approximately reconstructs the corresponding mix, subject to mix-bus and mastering-stage processing.

This architecture is designed for applications where the relationship between source and result is itself useful training data—not merely the availability of isolated recordings.

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☘️ About Celtic Constellation Reference Sessions

Celtic Constellation Reference Sessions brings the Reference Sessions architecture to the instrument family represented by Harmonic Frontier Audio's Celtic Constellation series.

Performances are recorded specifically for the Reference Sessions product rather than assembled as arbitrary excerpts from existing datasets. Traditional acoustic arrangements preserve recognizable ensemble relationships, while contemporary arrangements place shared Celtic source performances into substantially different production environments.

The preview demonstrates this principle using The Kesh Jig / Paddy's Leather Breeches, a traditional public-domain Irish jig set. The two finished arrangements share the same smallpipes and whistle source performances, with portions of the Bodhrán source also shared, allowing direct comparison of identical performances across contrasting musical contexts.

The session is tempo-locked at 113.3 BPM in 6/8, moving from A Major for The Kesh Jig to B Minor for Paddy's Leather Breeches. The source instruments were recorded at a tuning reference of A = 447.9 Hz.

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📂 Contents

Audio Files (.wav)

• 96 kHz / 24-bit WAV
• Stereo finished mixes
• Stereo-encoded isolated stem excerpts
• Tempo-locked and aligned to a shared session timeline
• Purpose-recorded source performances
• Finished mixes professionally mixed and mastered

This preview includes 4 audio files:

• Contemporary Full Mix — 2:28
  A finished, mixed and mastered contemporary Celtic jazz/pop fusion arrangement featuring Smallpipes in A, Whistle in A, Bodhrán, piano, synth, bass guitar, and drum kit. Piano, synth, bass guitar, and drum kit were programmed via MIDI in Logic Pro.

• Traditional Full Mix — 2:28
  A finished, mixed and mastered traditional acoustic arrangement featuring Smallpipes in A, Whistle in A, acoustic guitar, and Bodhrán.

• Dry Whistle Stem Excerpt — 0:22
  An isolated dry excerpt of the Whistle in A lead-melody source performance, containing the opening pass of the A part of The Kesh Jig. This exact source take is used in both finished arrangements and begins at the same timeline position as both mixes.

• Dry Smallpipes Stem Excerpt — 0:22
  An isolated dry excerpt of the Smallpipes in A lead-melody source performance, also containing the opening pass of the A part of The Kesh Jig. This exact source take is used in both finished arrangements and begins at the same timeline position as both mixes.

Preview scope: The two finished mixes are complete arrangements. The isolated dry stems in this proof-of-concept are shorter excerpts aligned to the beginning of the finished mixes. The intended full Reference Sessions product uses full-length, sample-aligned dry and processed stems for its complete arrangements.

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Metadata (.csv)

The preview metadata documents both the audio assets and the relationships between them, including:

• file name and file role
• product vertical and series
• session and work identifiers
• rights status
• mix variant and processing state
• full-versus-excerpt coverage
• alignment group and source-take identifiers
• source lineage and shared-performance relationships
• stem instrument and stem role
• instruments present
• arrangement style
• performer and arranger
• MIDI programming credits where applicable
• BPM and time signature
• key / tonal center and key-change notes
• tuning reference
• timeline start offset and alignment status
• tempo-lock status
• duration, sample rate, bit depth, and channel configuration
• recording chain and production DAW
• mix/master credit
• descriptive content notes
• dataset version

The shared CC_RS_001_TIMELINE_A alignment group and source-take identifiers make the relationship between the dry excerpts and both finished mixes explicit.

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🎤 Recording & Production Notes

• Performer / Arranger / Mix & Master: Blake Pullen
• Production DAW: Logic Pro
• Audio capture: Zoom F8n Pro used as a USB audio interface with a MacBook Pro running Logic Pro
• Smallpipes in A: Oktava MK-012
• Whistle in A: Oktava MK-012
• Bodhrán: matched stereo pair of Oktava MK-012 microphones
• Acoustic Guitar: matched stereo pair of Oktava MK-012 microphones
• Contemporary arrangement MIDI programming: piano, synth, bass guitar, and drum kit
• Session tempo: 113.3 BPM
• Time signature: 6/8
• Tonal centers: A Major → B Minor
• Tuning reference: A = 447.9 Hz
• Released audio: 96 kHz / 24-bit

The smallpipes and whistle performances are shared between the traditional and contemporary mixes. Portions of the Bodhrán source performance are also shared. This controlled source lineage allows the arrangements to demonstrate how common performances behave under substantially different arrangement and production choices.

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🌈 Spectrogram Preview

Below is a spectrogram illustrating the complete traditional acoustic arrangement, showing the combined spectral structure and temporal development of the Celtic ensemble across the full finished mix:

⚡ Usage

This preview pack is designed for:

• Evaluation of the Harmonic Frontier Audio Reference Sessions dataset architecture
• Music-generation and arrangement-modeling research
• Source-separation and stem-reconstruction research
• Modeling relationships between dry sources, processed tracks, and finished mixes
• Studying how identical performances behave across traditional and contemporary arrangements
• Instrument-context and ensemble-interaction modeling
• Mix, production, and timbral-transformation research
• Conventional production, educational, and reference applications

👉 Note: This is a proof-of-concept preview, not a complete multitrack session or full commercial dataset.

The intended full Celtic Constellation Reference Sessions product expands the concept to multiple purpose-recorded arrangements, traditional and contemporary production variants, alternate lead-instrument configurations, and complete sample-aligned dry and processed stem sets.

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💡 Full Dataset Availability

This repository is a preview and market-validation release for the Celtic Constellation Reference Sessions concept.

The planned full commercial dataset is intended to provide a substantially larger collection of finished arrangements and their aligned production components. Final scope and file counts may evolve based on production design and market feedback.

For commercial licensing or Reference Sessions 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/Celtic_Constellation_Reference_Sessions_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

• Celtic Constellation Series (Previews)
• Human Vocality Primitives 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

The musical works represented in this preview are identified in the metadata as traditional / public domain. The recordings, performances, arrangements, production, mixes, and associated metadata are original Harmonic Frontier Audio assets.

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📧 Contact

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

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🗒️ Release Notes

Version 0.9 (August 2026) – Initial proof-of-concept Preview Pack release for Celtic Constellation Reference Sessions.
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). Celtic Constellation Reference Sessions Dataset (Preview) [Data set]. Harmonic Frontier Audio. Zenodo.
https://doi.org/10.5281/zenodo.22088584

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

BibTeX

@dataset{pullen_2026_celticconstellationreferencesessions_preview,
  author       = {Blake Pullen},
  title        = {Celtic Constellation Reference Sessions Dataset (Preview)},
  year         = {2026},
  publisher    = {Harmonic Frontier Audio},
  version      = {0.9},
  doi          = {10.5281/zenodo.22088584},
  url          = {https://doi.org/10.5281/zenodo.22088584}
}