Available Now

HEARING PERSONALIZATION
FOR MUSIC

If your product plays music, we can put hearing correction into it. Headphones, speakers, streaming apps, media players, soundbars, cars.

The work is done under a Non-Recurring Engineering agreement, or NRE. It is a one-time engineering engagement to adapt our hearing correction and sound personalization technology to your product and get it shipping. After launch, a recurring fee keeps it maintained and updated.

The technology is finished. It is in the market today with paying users. The engineer who built it is the one who does the integration.

WHERE IT CAN LIVE

Hearing correction can live in more than one place. Each option changes the user experience and the integration work. Pick one, or combine them.

Your companion app

Your app controls the correction through an inter-app link to ARIA ONE and FullScale, or we rebuild the experience on top of the stack if you want everything under one icon.

Inside the device

Correction runs on the chipset in the headphone or speaker, so every source is corrected, including Spotify Connect and AirPlay.

Your streaming or player app

The hearing test and correction live inside the listening app, with correction applied before the audio leaves the app.

In the car

Correction runs in the head unit or amplifier DSP, with a profile per seat, so each passenger hears the system corrected for their own ears.

Your backend

Profile storage, sync, and calibration data can be hosted by us or deployed in your infrastructure, so the user profile follows the customer across devices and products.

ARIA ONE, bundled with your hardware

Our finished app ships with your hardware, calibrated for it and branded for your product.

PICK YOUR MODULES

This is a modular system. The hearing test, profile handling, and calibration for your device come with every configuration. The main decision is which sound modules you want included.

Hearing Correction

Full-spectrum correction from the listener’s hearing profile, to 20 kHz.

Shipping today in ARIA ONE →

Altitude Limiter

Correction adds gain. Gain needs a limiter. This one is built for corrected audio: multi-stage, adaptive, and transparent.

Shipping today →

Crossfeed

For headphones. A natural, speaker-like presentation that reduces fatigue on long listening sessions.

Shipping today →

Corrective EQ

Room, transducer, and preference EQ placed after the hearing correction stage.

Shipping today →

Every module ships tuned and ready to use. If you want a house sound, we tune it with you and lock it in.

The standard arrangement is co-branding: your product and brand up front, with Altitude credited as the technology inside. Full white-label is possible under a different agreement and price.

HOW AN ENGAGEMENT WORKS

Step 1

A conversation

Tell us what you make and where you want hearing correction to live. We will tell you what is involved and give you a rough cost. No commitment.

Step 2

A scoped statement of work

Deliverables, milestones, acceptance criteria, which modules you are shipping, and where the correction lives. You know exactly what you are getting before anything starts.

Step 3

The NRE fee

A one-time fee for the engineering, billed against milestones. It covers the port, the calibration, the tuning, and integration support through your launch.

Step 4

The recurring fee

Once you are shipping, one of three models keeps it current: a per-unit royalty, an annual license, or an annual maintenance fee. It covers OS and platform updates, new device calibrations, fixes, and hosted services if you use them. We pick the one that fits how you sell.

Ownership

Altitude keeps ownership of the hearing test, the correction engine, the limiter, and the device calibration we produce for your hardware. You license them for the products named in the agreement. The calibration stays tied to the hearing test.

Your house sound and presets, your interface and app code on your side of the integration, and your branding remain yours. We do not take that tuning and sell it to anyone else.

ARIA ONE running on two phones

ARIA ONE ON YOUR HARDWARE

Need the fastest path to market? Ship the app that already exists. ARIA ONE is live today on Mac, Windows, iOS, and Android with paying users.

Bundle it with your hardware. We calibrate it for your device, brand it for your product, and tie activation to the purchase. The NRE is small because the product already exists.

After launch, an annual maintenance fee covers hosting, updates, and support. It is the right first move if you want to test demand before committing to a deeper integration.

WHAT WE NEED FROM YOU

Less than most teams expect.

Production samples of the hardware, for calibration and testing.

A technical contact who knows your audio path and your app or firmware build.

Access to the build target: your app repository, your DSP toolchain, or your player codebase, depending on where the correction will live.

Which modules you want, and whether you want a house sound.

Time from your team for milestone reviews. The bulk of the work is ours; yours is the approvals.

COMMON QUESTIONS

Does this work with Spotify Connect, AirPlay, and Chromecast?

Only if the correction runs inside the device. Casting sends audio straight to the speaker or headphone and skips any app on the phone or computer. On-device integration corrects every source. App integration corrects what plays through the app.

Can it run on our chipset?

In most cases, yes. The engine has FIR and SOS modes, so it scales from desktop CPUs down to embedded DSP. Send us the part and its budget and we will tell you what fits.

How much latency does it add?

Latency is set by the limiter’s lookahead and measured in samples. It can be as short as one sample. Oversampling or sample-rate conversion add more latency, which is why most hardware integrations avoid them. In practice, you choose the lookahead and that is the latency.

Who owns the hearing data?

The customer. Where it is stored is part of the agreement: on their device, on your servers, or on ours. We do not use partner customer data for anything outside the product.

Can we license only the limiter?

Yes. The limiter, Crossfeed, and Corrective EQ are self-contained DSP modules and can each be licensed on their own. The hearing test is different: it needs to own the audio thread and the app lifecycle, so it ships as its own app that yours links to, or as the foundation your app is rebuilt on.

Can you put the hearing test inside our companion app?

Yes, but it is usually the wrong first move. Done properly, it means rebuilding your companion app on top of ARIA ONE, which is a multi-application project. An inter-app link gives the customer the same result for a fraction of the cost, and your app stays yours. If you still want one icon after that conversation, we will build it.

How is this different from other hearing personalization SDKs?

Three differences. The correction is full spectrum to 20 kHz. The limiter is designed specifically for corrected audio, not borrowed from a general-purpose stack. And the whole system already runs on four operating systems with paying users, so you are embedding something proven rather than a demo.

What does the maintenance fee cover?

OS and platform updates, fixes, new device calibrations as you release products, and hosting for sync and AI features if you use them. It is priced so the integration stays healthy for the life of the product.

How long does an integration take?

Scope determines the timeline. Letting your companion app control the correction through an inter-app link is measured in weeks. Bundling ARIA ONE with your hardware is similar. Building the engine into firmware is longer and depends on your chipset. Rebuilding a companion app on top of the full stack is measured in months. The statement of work gives the real estimate.

Do you work with companies outside the United States?

Yes. The work is remote. Hardware samples are the only part that needs to travel.

START THE CONVERSATION

Tell us what you make. We will tell you where hearing correction fits, what it takes, and what it costs.