Privacy Policy

Effective date: 24 August 2026

Atrium is a desktop app that personalizes the sound on your computer. Two principles guide everything here: your audio is never recorded, and your data is used for exactly one thing, tuning your sound.

What Atrium processes

To do its job, Atrium reads the audio your computer is playing, applies your personalized equalization and spatial processing, and plays the result to your headphones. This happens entirely in memory, in real time. No audio is ever written to disk, recorded, or sent over a network.

Atrium does derive a numeric summary of a song's tonal balance from that audio. See Song measurements below for exactly what that is and where it goes.

What Atrium stores

On your device: your hearing-assessment results, sound preferences, headphone selection, equalizer settings, saved presets and rooms, and app settings live in Atrium's local storage. Your audio-device choices (which cable, which output) stay only on that PC.

In your account: a copy of those same settings, so signing in on another computer restores your setup. It is stored as one settings record that is replaced when your settings change, is never used for anything except restoring your setup, and is deleted with your account. Signing out resets that PC to defaults; your account's copy stays safe.

You can erase the on-device data at any time from Settings → Privacy → Delete all data, or by uninstalling the app.

Song measurements

Atrium measures the frequency balance of what you play, so it can gently even out mastering problems without stripping a record's character. That measurement is a 31-band summary of the tonal balance, plus tempo, an energy estimate and the track's title, artist and album. It is not a recording, and audio itself is never captured, written to disk, or uploaded. You cannot reconstruct a song from it any more than you could from a graphic-equalizer display.

Measuring happens on your device and stays there by default. Contributing those measurements to Atrium's shared song library is a separate opt-in, off unless you turn it on in Personalization → Playback options → Contribute measurements. Turn it off and nothing further is sent.

If you do contribute, a measurement is only ever served back to anyone as an average across at least three different listeners. A song measured by fewer people is never returned, so a request cannot reveal what any one person played. Your contributions are deleted with your account.

Hearing & health data

Atrium's tests measure aspects of your hearing to tune your sound. The results are stored on your PC. If you sign in, they also sync with your account so your tuning can follow you between machines; with no account they never leave your device. Either way they are never sold, shared, or used for anything else. Atrium is not a medical device and does not provide medical advice or diagnosis. If you have concerns about your hearing or tinnitus, please consult a qualified audiologist.

This includes the Sound Tolerance test, which records the levels you found uncomfortable and your answers to two questions about whether particular everyday sounds bother you. Those answers stay on your device and sync only if you sign in. None of it is included in the anonymous stats described below, which carry your age range and headphone model and nothing else. If sound is often painful, or specific sounds cause you real distress, an audiologist can assess that properly; Atrium cannot.

Update checks

Atrium checks for updates when it starts and every few hours while it runs. That request tells us an install is active, and we use it to count how many people use Atrium. It is counted anonymously and it is a counter, not a log. We store one row per install per day: the date, a one-way hash, the app version, and the coarse country the request already carries. We do not store your IP address. The hash is made from your IP address mixed with a random daily salt that is thrown away after two days, so the same machine produces a different hash each day and yesterday's records cannot be tied to today's, by us or by anyone else. There is no record of when or how often you checked, and nothing links an update check to an account.

Along with the anonymous product stats described next, this is everything Atrium sends if you use it without an account. Neither one carries an email address, a name, your hearing results, or your settings.

Accounts and purchases

Atrium does not require an account. The free version runs entirely on your PC, and if you never make an account the only things we receive are the anonymous update check and the anonymous product stats described above: no email address, no name, no hearing results, no settings. An account is optional and adds the parts that need a server, such as carrying your Signature to another computer and the shared song library. Signature Edition does require one, because a subscription has to be checked against something. For an account we store your email address and a salted hash of your password (never the password itself), or your Google account id if you sign in with Google (Google shares your name and email with us), plus your signed-in devices. Subscribers also have a Stripe customer id. Payments are processed by Stripe; we never see or store your card details. Password-reset and account emails are delivered by our email provider and your address is used for nothing else. You can delete your account at any time from the account page; that deletes your account data including your synced settings. Deleting the account does not cancel a subscription (manage that in the billing portal) and does not touch anything stored on your PC.

Anonymous product stats

Once a day, Atrium sends two things: the age range you gave during setup, if you gave one, and the headphone model currently selected in the app. The app version goes with them. We use this to understand who Atrium is actually for and which headphones to prioritise, which is difficult to know otherwise because most people use Atrium free and never create an account.

It is counted the same anonymous way as update checks, and it is a counter, not a log. We store one row per install per day, keyed by the same kind of one-way daily hash. We do not store your IP address, the daily salt is discarded after two days, and a row cannot be linked to yesterday's row, to an account, or to you. Changing your headphones twice in a day updates that single row rather than recording the change, so there is no history of what you did or when.

Your age is stored and sent as a range, such as 35 to 44. We never ask for or hold a date of birth. Answering is optional: Prefer not to say is offered alongside every range, and choosing it sends exactly that.

The age range is also used on your own device to read your hearing-test results more accurately, because hearing changes with age in well-documented ways. It does not change your sound on its own: if you never take the hearing assessment, telling us your age changes nothing about what you hear.

Third parties

Atrium does not include third-party analytics, advertising, or tracking SDKs inside the app. The third parties involved are Stripe (payments and subscription billing), our email provider (delivering password-reset and account emails), and Google, only if you choose to sign in with Google.

The website

atriumaudio.net counts downloads anonymously: the date, the country (from the CDN), and the page you came from. There are no ad trackers and no tracking cookies.

Children

Atrium is a general-audience audio utility and is not directed at children under 13. It does not knowingly collect information from children.

Changes to this policy

If this policy ever changes, the updated version will be published here and dated above.

Contact

Questions about your privacy with Atrium? Email [email protected].