Protocol
Build knowledge by comparison.
Choose a baseline, calibrate comfort, change one meaningful variable when possible, and preserve a reliable return.
Personal method, not a prescribed progressionFree in the U.S. Mac App Store and U.S. Microsoft Store
Create binaural sessions.
Explore with intention.
Threshold Lab is a desktop audio laboratory for consciousness exploration. Create custom sessions with binaural tones, guided narration, sound beds, and silence. Begin with an included design, use optional AI planning, or build by hand while keeping the session structure and audio layers visible.
The Mac edition supports Apple-silicon Macs running macOS 12 or later. The Windows edition is available for Windows 11 PCs with x64 or ARM64 processors.
7Learn chapters
14User Guide chapters
20Included design recipes
5Independent audio buses
What Threshold Lab is for
Focused inner discovery—with the instrument left open.
Threshold Lab is built for self-directed exploration of focused altered states of consciousness: deep relaxation, inward attention, imagery, witness awareness, loving presence, silence, and deliberate return. These are session intentions—not promised results.
Binaural tone relationships create the stereo framework. Guided narration directs and releases attention. Noise, nature beds, intentional silence, and gradual frequency journeys shape the listening environment. You can simply listen, or inspect the prompt, plan, timeline, and rendered WAV to understand and change every choice.
The real application
A laboratory should let you see the instrument.
These nine macOS 1.0.5 captures show the earlier released interface. They illustrate the established workspaces; the newer composition controls are explained in the product tour. Open any image at full size to inspect the controls, structure, and educational detail.
A different kind of listening app
The session is not a black box.
Many audio apps begin and end with a Play button. Threshold Lab lets you listen, then look underneath: timing, narration, tone pairs, frequency journeys, procedural beds, gain structure, fades, and the return path all remain visible.
Begin with a curated Library design, ask AI Lab to propose a structured plan, or author every segment directly. The same application supports the curious beginner and the advanced creator without pretending that one frequency guarantees one result.
Six connected workspaces
Listen, learn, design, observe, and refine in one laboratory.
Each workspace has a clear purpose. Together they form a path from first orientation to precise manual authorship.
Education
Understand the sound before changing it.
Seven science-and-practice chapters sit beside a fourteen-chapter guide covering every workspace, control, audio field, and export.
Explore the learning centerAI Lab
Turn ordinary language into an inspectable plan.
A supported provider proposes structured JSON. Threshold Lab validates the result, displays every segment, and performs voice and audio rendering locally.
The provider plans; your computer rendersSession Library
Learn by listening and reverse engineering.
Twenty original designs form the included collection across eight families. Every prompt, plan, and description is installed as a readable local file. The complete 90-minute Witness WAV is ready immediately; the app keeps the other 19 visible until you render them.
20 original designs · 60 readable files · 1 included WAVExperience Records
Keep useful observations without being scored.
Optional local records can capture comfort, awareness, return quality, and what you may change next. Nothing is required and nothing is graded.
The human listener remains the judgeSession Creator
Author the complete timeline directly.
Build segments, stack binaural layers, write timed narration, choose noise and nature beds, balance the five buses, audition, and export lossless audio.
See every capabilitySession anatomy
A guided session is a score, not a single sound.
Time gives the session its structure. Independent layers give it character. Each can enter, change, fade, or remain silent for a reason.
- Binaural tones define carrier pairs and difference-frequency journeys.
- Noise and nature provide separate procedural acoustic beds.
- Voice places visible, timed guidance between intentional silences.
- Master and fades shape the combined output and session edges.
Voice
Binaural
Noise
Nature
Lanterns
Every block has timing
Every layer has level
Every session has a return
Education built into the product
The science is explained without turning uncertainty into a sales claim.
Learn why the carrier is not the beat, what conventional EEG band names do and do not mean, how noise colors differ, why channel separation matters, and where evidence is established, mixed, or personal.
Visit the learning centerAdvanced when you want it
Fine control, with plain-language explanations beside it.
Session Creator exposes the signal design without requiring you to begin as an audio engineer.
- Carrier center 40–1200 Hz The audible center pitch
- Beat difference 0.5–40 Hz Hold or linear journey
- Tone stack Up to 8 Independent layers per segment
- Voice speed .75 · 1 · 1.25 Locally rendered narration
Procedural noise colors
Shape the spectrum, not a mood label.
Dark brown, brown-pink, pink, brown, white, blue, and violet describe how generated noise energy is distributed across frequency.
- Dark brown
- Brown-pink
- Pink
- Brown
- White
- Blue
- Violet
Procedural nature beds
Motion without a field recording.
Ocean, rain, waterfall, and stream beds are generated locally and mixed on a bus separate from noise, tone, voice, and master.
From intention to an inspectable master
Create a custom binaural session. Understand each choice.
Start with the experience you want to explore: its duration, tone relationships, narration, sound beds, and moments of silence. Write a brief for AI Lab or build the timeline by hand. AI assistance is optional; its structured plan remains open to inspection.
Describe or design
Begin with an intention in AI Lab, open a Library starting point, or build directly in Session Creator.
Inspect the plan
Read the Rows timeline and Automation curves. Inspect tone pairs, narration, beds, fades, and the return before listening.
Render and audition
Generate narration and procedural audio locally, then balance and test the complete playback path.
Export the bundle
Save the lossless WAV with a matching design prompt, portable plan JSON, and descriptive text.
Four matching artifacts
The WAV is the result—not the only thing you receive.
The learning bundle makes a finished session easier to study, archive, reproduce, and revise. Each part shares the same descriptive base name.
Witness arrives with all four artifacts and can be played immediately. The other nineteen designs begin with an authored prompt, exact plan, and readable description; rendering adds each matching WAV without relabeling the original design.
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01
Design Prompt
The intention and constraints -
02
Plan JSON
The portable timed recipe -
03
Description TXT
The plan in readable language -
04
Lossless WAV
The finished stereo master
An original starting library
Twenty original designs. One finished flagship. Nineteen to render.
Compare short calibration checks, foundational practices, witness sessions, silence studies, return training, loving awareness, variability, and integration. They are starting points for inquiry—not levels the listener must complete.
Every included design installs its authored prompt, exact JSON plan, and description on first launch. The complete 90-minute The Witness at the Threshold WAV is included and ready to play. A persistent progress reminder shows that the remaining nineteen designs still need local rendering and opens the next one in AI Lab whenever you are ready.
- Calibration
- Foundation
- Witness
- Silence Study
- Return Confidence
- Loving Awareness
- Threshold Variability
- Integration
A plain data boundary
Local where the sound is made. Explicit where a provider is used.
Procedural audio, narration rendering, playback, profiles, session history, Experience Records, and WAV export are handled on your computer.
AI Lab contacts the provider you select only when you ask it to generate a plan. Session Creator works without an AI request. The Mac App Store edition is designed for user-supplied provider credentials.
Read the privacy overviewPersonal without becoming prescriptive
Up to twelve local profiles. Zero required progress scores.
Separate working spaces
Customize names, initials, subtitles, and colors. Each profile keeps its own current session, pinned work, history, voice choice, and saved AI Lab state.
Optional reflection
Experience Records can preserve observations tied to a session version. They never unlock content, gate use, or define personal progress.
Comfortable appearance
Choose light, dark, system, or a custom palette so a long design session fits the room and the person using it.
Free in U.S. stores
Threshold Lab is free in the U.S. Mac App Store and U.S. Microsoft Store.
In the U.S., download the Mac or Windows edition at no cost directly from its platform store.
Free in U.S.
macOS
Mac App Store
Supports Apple-silicon Macs running macOS 12 or later.
Get it free in the U.S. Mac App Store
Free in U.S.
Windows
Microsoft Store
Supports Windows 11 PCs with x64 or ARM64 processors.
Get it free in the U.S. Microsoft StoreThe zero-price claims and structured offers on this page are U.S.-specific; pricing and availability may vary by region.
Responsible use
Precision over the audio. Humility about the outcome.
Threshold Lab is not a medical device, therapy product, diagnostic tool, or promise of a particular mental, physical, spiritual, or altered-state outcome.
Use stereo headphones only in a safe setting. Never listen while driving or operating machinery. Stop if you experience distress, dizziness, unusual discomfort, or another adverse reaction.
Threshold Lab for Mac and Windows
Explore with intention. Understand the layers. Build your own path.
Threshold Lab gives people curious about consciousness a transparent way to listen, study, compare, and create. Explore the capabilities, then download the Mac or Windows edition free from its U.S. platform store when you are ready.