# SUS4 Mix Check

> A/B your mix to a reference.

Canonical page: [https://chrome-stats.com/d/id6777229916](https://chrome-stats.com/d/id6777229916)

## Overview

- **ID:** `id6777229916`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** ThePaulSmith
- **Category:** Music
- **Version:** 1.1.2
- **Last updated:** 2026-09-14
- **First published:** 2026-06-16
- **Size:** 19 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sus4-mix-check/id6777229916)
- **Website:** [https://4chords.studio](https://4chords.studio/)
- **Privacy policy:** [https://4chords.studio/privacy](https://4chords.studio/privacy)

## Description

A/B your mix, check LUFS, get a plain-English report. Everything runs on-device.

Does your mix translate? Find out.

You have been in the session for four hours and you have lost perspective. SUS4 Mix Check gives you an objective read: A/B your mix against a professional reference track, check integrated LUFS against streaming platform targets, and see the frequency spectrum of both tracks overlaid so gaps and buildups are visible immediately.

The plain-English report translates the technical data into actionable language — not a raw frequency chart that requires interpretation, but a clear note that says what needs attention and where. Useful for the final check before you send a mix to a client, and useful mid-session when you need a reset.

• A/B comparison: your mix against any reference track
• Integrated LUFS measurement against streaming platform targets
• Spectrum overlay: your mix and the reference on the same display
• Plain-English report — specific, actionable, no jargon required
• Genre reference presets for common target levels

All analysis runs on-device. No audio is ever uploaded.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Rankings

- #2,127,818 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6777229916)