AUMIXYS
WHAT’S NEW

09/16/2026: Added the Cinematic / Ambient preset to Audio Fix.

Why the measurements are trustworthy
Python Backend DSP
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NumPy SciPy
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librosa soundfile
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FFmpeg Audio decoding
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64-bit DSP Engine
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ITU-R BS.1770 Standard
Badge: no AI training on your music
Private AI Tips AI Tips uses only numerical report data, never the uploaded audio file. No AI training on your music.
Badge: saves your CPU
Aumixys Server Analysis All analysis is performed on our powerful servers, saving your local CPU and memory for your creative work.
Free: 1 full analysis daily. Audio Fix after preview.

Spotify Loudness Checker

Check if your master is ready for Spotify: LUFS True Peak clipping and Audio Fix preview before download.

Check my track Hear Audio Fix ▶ See demo report (1 click)
Free: 1 full analysis daily Release risks: True Peak, dynamics, stereo Audio Fix: Before/After preview before payment
Streaming targets: Spotify -14 LUFS Apple Music -16 LUFS YouTube -14 LUFS TIDAL -14 LUFS
Audio Fix in Aumixys
Tool page

Spotify Loudness Checker

Check if your master is ready for Spotify: LUFS True Peak clipping and Audio Fix preview before download.

Check LUFS, True Peak and clipping before sending your master to Spotify. Audio Fix lets you hear the fix before downloading it.

Check my track ▶ Open live demo Hear Audio Fix Check Loudness Penalty Check clipping and True Peak All tools
Before sending to Spotify

Is your master ready for Spotify?

Sending a track to Spotify is not about hitting one “perfect” LUFS number. Check how the full master combines loudness, True Peak and clipping risk, then make the decision by listening.

If predicted normalization turns a track down, that is not automatically a problem. What matters is whether it keeps its energy after level matching and whether its peaks remain safe after encoding.

1. Measure the full master

Integrated LUFS shows the track’s loudness context, not a target to chase on its own.

2. Check gain adjustment and peaks

Pair predicted gain adjustment with True Peak so you do not miss encoding risk.

3. Decide by listening

If the report shows an audible mastering problem, compare the Audio Fix preview before unlocking a file.

Loudness Penalty Analyzer Audio Clipping Checker Streaming normalization guide
Three priority tools

From a mastering problem to a confident decision

Check Spotify loudness, predicted normalization or clipping. Then run a full analysis and, only when the problem calls for it, hear Audio Fix.

Spotify Loudness Checker Check if your master is ready for Spotify: LUFS True Peak clipping and Audio Fix preview before download. Check your loudness penalty LUFS i True Peak przed publikacja na Spotify Audio Clipping Checker Detect clipping sample peak and True Peak before distribution. If you hear a problem try Audio Fix. Audio Fix Hear Before/After without login and unlock the WAV only after deciding.
Analysis modes

Choose the analysis workflow you need

Three focused paths: single track diagnostics, A/B comparison, and full album consistency checks.

Single file audio analysis
Analyzer - single file
Best starting point for one track. Get LUFS, True Peak, spectrum, stereo, dynamics, and fast release-focused guidance.
Open analyzer ->
A/B comparison of two track versions
Compare A/B - two files
Compare mix vs master, audition alternate versions, and inspect audible plus metric differences in one view.
Compare versions ->
Audio Fix Before After preview without login
Audio Fix - fix audio
A separate path for quick corrective mastering. Hear the A/B preview without login first, then buy the full WAV only after deciding.
Open Audio Fix ->
Batch album and consistency analysis
Batch - full album
Check loudness and quality consistency across tracks. Ideal for final QC before releasing an EP or full album.
Analyze album ->
Quick learn

Not sure what to fix in your master?

Start with short guides that explain the core metrics used in the report.

LUFS and loudness True Peak Stereo and phase Kick and bass
Features

Everything your master needs

Aumixys technology combines classic audio engineering with modern spectral analysis and AI.

🎧
LUFS & Loudness
Integrated, Short-term and Momentary LUFS with loudness histogram. Check if your track passes Spotify normalization.
📈
True Peak (ISP)
Oversampled peaks with clipping position detection. Safe -1.0 dBTP ceiling — the streaming standard.
🌈
Spectrogram & Heatmap
Full frequency spectrum with band splitting and interactive heatmap. Detect missing or excessive octaves.
KB
Low-End Conflict Beta
Heuristically points to low-end masking risk and gives a starting point for dynamic EQ. Accurate separation requires stems or source separation.
🔊
Stereo Analysis
L/R correlation, stereo width, Mid/Side balance and phase goniometer. Ensure your mix doesn't disappear in mono.
⚡
Dynamics & Crest Factor
DR Meter, Crest Factor, RMS vs Peak over time. Assess if your mastering breathes — or if it's too squashed.
🤖
AI Tips & Auto QC
Automatic tips based on analysis. Quality control with report: clipping, phase, DC offset, silence, transcode.
🔁
A/B Comparison
Intelligent listening with gain matching and EBU R128 normalization. Compare versions without volume cheat.
📚
Batch (Album)
Consistency analysis of the entire album. LUFS comparison, streaming compliance, batch quality control.
🎹
Key & Tempo
Automatic key and BPM detection. Chroma profile and tempo over time — including live recordings.
How it works

How it works?

Three simple steps to professional sound of your track.

1
Upload audio file
Drag WAV, MP3, FLAC, OGG or AIFF (up to 150 MB). Fast start and online analysis.
->
2
Auto analysis
Our engine will process the audio, calculate loudness, dynamics, and check for technical errors.
->
3
Report & tips
You receive a complete report with charts, QC assessment, and specific AI tips to improve your mix.
10+
Analysis Modules
150 MB
Max File Size
0 $
Start for free
Fast
Online analysis
Pricing

Pick your plan

All plans include full audio analysis. They differ in the number of analyses and access to premium features.

Monthly billing Annual billing (Save more)
No subscription needed? Listen to Before/After first, then unlock a single Audio Fix download.
Audio Fix 2.99 USD + VAT

Free

Test the service and perform your first analysis.

0 $ / month
  • - 1 full analysis per day
  • - Audio Fix: unlimited A/B preview; fixed-version download 2.99 USD + VAT
  • - Full Single report: LUFS, True Peak, spectrum, stereo, dynamics, BPM and key
  • - One general AI Tip with an upgrade CTA
  • - Analysis base: up to 3 saved reports
  • - Song folders and basic version history
  • - No standalone A/B comparison
  • - No Batch (album analysis)
  • - No PDF & JSON export
Start analysis

Premium

For albums, EPs and larger catalogs where consistency across tracks matters.

19 $ / month
billed annually ($159)
  • - Audio Fix: 15 fixed-version downloads per 30 days
  • - Unlimited analyses
  • - Batch: album and EP analysis
  • - Unlimited A/B comparisons
  • - Unlimited analysis base and version history
  • - Full AI Tips with no limits
  • - PDF & JSON export
  • - Everything in Normal plus album workflow
  • - Priority support
Choose Premium
Secure payments and subscriptions are handled by Lemon Squeezy. Automated invoicing is provided by the Merchant of Record, and you can cancel your subscription anytime from your account.
Knowledge Base

Audio analysis standards for mastering

Educational section for producers and engineers. We explain Audio Normalization Standards, Loudness Penalty, True Peak, Stereo Image Analysis and Phase Correlation.

1) LUFS and Loudness Penalty
Streaming platforms use loudness normalization. If a track is too loud, Loudness Penalty is applied and the platform turns it down. High LUFS alone is not an advantage and often damages dynamics.
2) True Peak vs Sample Peak
Sample Peak is not enough. After codec conversion, inter-sample peaks (ISP) may appear and clip even when a mix looked safe. True Peak helps estimate real clipping risk after transcoding.
3) Stereo Image Analysis and Phase Correlation
A wide stereo image sounds impressive, but poor phase correlation can collapse energy in mono playback. Stereo Image Analysis and Phase Correlation help balance width, mono compatibility and vocal clarity.

FAQ: mastering and technical quality

Is -14 LUFS always the target?

Not always. -14 LUFS is a common reference, but genre, arrangement and production aesthetics matter. What matters most is the relationship between Integrated LUFS, Short-Term LUFS, True Peak and dynamics.

Why use dithering during export?

Dithering reduces quantization distortion when reducing bit depth (for example 24-bit to 16-bit). When used correctly, it preserves low-level detail and improves final master quality.

How should you read Audio Normalization Standards?

Treat standards as a set of technical constraints: target loudness, True Peak ceiling, stereo stability and no clipping. The best result is a master that passes quality checks and translates across playback systems.

Why Aumixys

Analysis that translates into better releases

Aumixys is not just another meter. It is a practical decision tool for producers, mixing engineers and mastering engineers. Instead of guessing what to fix before release, you get a clear picture: where the track is too loud, where it loses dynamics, whether stereo stays stable and whether transcoding can introduce artifacts.

Pre-release workflow
Late fixes are the most expensive part of mastering. Aumixys shortens that decision loop: upload a file, get a full report, and immediately see if the material is ready for Spotify, YouTube and Apple Music. In practice this means fewer iterations, less blind trial-and-error and faster project closure. It matters even more for EPs and albums where consistency across tracks defines the quality of the full release.
Technical language, not guessing
LUFS, True Peak, Phase Correlation, dynamics, spectrum and clipping control are technical signals that directly affect streaming translation. Aumixys combines those metrics into one coherent analysis, so instead of scattered numbers you get one clear context. This makes it easier to decide whether you need limiter tuning, tonal balance changes, transient control or stereo width correction.
A/B comparison without loudness bias
Our hearing naturally prefers the louder version even when it is objectively worse. That is why A/B in Aumixys uses gain matching and normalization for fair comparison. You can reliably check differences between master versions, between your track and a reference, or between revisions after client feedback. This saves time and reduces wrong decisions driven by loudness bias.
Who is this for?
For independent producers who want more confidence at release time. For mixing engineers who need a fast sanity check before delivery. For mastering engineers who want faster technical diagnostics and consistent quality standards. For labels and A&R teams comparing multiple versions with a repeatable, measurable audio evaluation process.

Ready to check your master?

Launch Mastering Analyzer now and check your master quality in seconds.

Start Analyzer