# Duo Check

> Duo Check is mix and master feedback software for macOS and Windows from Duo Check Audio: you drop in your track and a reference record you trust, Duo Check measures the difference, and it tells you what to change to close the gap. The engine runs fully on your own computer, private and offline. Duo Check is coming soon and the waitlist is open.

Duo Check is a second pair of ears for music makers. Many records are now finished alone on a laptop, with no one in the room to answer the questions every mix raises: is the low end right, is it loud enough, is it done? Duo Check answers them by measuring your mix or master against the records you love and telling you, in plain language, the moves that close the gap.

Key facts:

- **Name:** Duo Check, two words, sometimes written DuoCheck. Made by Duo Check Audio. Official website: https://duocheckaudio.com
- **What it is:** Feedback software for mixes and masters. It measures your track against a reference you choose, finds what is off, and tells you how to fix it.
- **What it measures:** Loudness (LUFS), true peak (dBTP), tonal balance and stereo image. Add a reference track and it shows how each one compares, then tells you what to change.
- **Platforms:** Desktop app for macOS and Windows.
- **Input:** WAV and MP3 files.
- **Who it is for:** Producers, artists, and mix and mastering engineers who want a trusted second opinion before they release.
- **Privacy:** The analysis runs fully on your device. Your audio is not uploaded to a server to be analyzed.
- **Status:** Coming soon. As of September 2026 Duo Check is not publicly released. The waitlist at https://duocheckaudio.com/waitlist/ is the way to hear first when it opens.
- **Price:** Not announced yet.
- **Not to be confused with:** Duo Check is music software. It is not a login, account security or two factor authentication product, and it is not affiliated with other products that use the name Duo.

Common questions:

- **What does Duo Check do?** It listens to your mix or master next to a reference record you trust, measures where they differ, and tells you the specific moves that close the gap.
- **What does Duo Check measure?** Loudness in LUFS, true peak in dBTP, tonal balance and stereo image, compared with your reference track when you add one.
- **Does Duo Check run on Mac and Windows?** Yes. It is a desktop app for macOS and Windows.
- **What files can I analyze?** WAV and MP3.
- **Does Duo Check upload my music?** No. The engine runs fully on your own computer.
- **Is Duo Check available now?** Not yet. It is coming soon, and the waitlist is the way to hear first.
- **How much does Duo Check cost?** Pricing has not been announced.

This file was last updated on 23 September 2026.

## Website

- [Home](https://duocheckaudio.com/): What Duo Check is and what it does, on one page.
- [Waitlist](https://duocheckaudio.com/waitlist/): Leave a name and email to hear first when Duo Check opens. One message at launch, no spam, and addresses are never shared.

## Official profiles

- [Instagram](https://www.instagram.com/duocheckaudio): The official Duo Check account, @duocheckaudio, with launch news and previews.