Free Online Audio Analyzer for Music Producers & DJs
Inspect loudness, peaks, stereo compatibility, dynamics and frequency balance before releasing or playing your music.
Analysis settings
Choose how you'll use the audio for more relevant advice.
What gets checked
Analyze your audio in three steps
Use Stem Analyzer to inspect an exported track or individual stem before mastering, uploading or testing it on a DJ sound system.
Choose your audio file
Export your mix from FL Studio, Ableton Live, Logic Pro or another DAW. Upload a supported WAV, MP3, FLAC, OGG or AIFF file; browser support varies by codec.
Select the right analysis context
Tell the analyzer whether you are checking a final master, premaster, bass or drum stem, or DJ/club soundcheck. The context changes advice, not the measured values.
Review, compare and export
Read LUFS, peaks, crest factor, stereo correlation and frequency energy. Save a reference to compare two tracks, or export the measurements as JSON or a text report.
Understand your audio before it reaches the speakers
Designed for producers, DJs and mastering enthusiasts. These checks provide useful measurements and context—not an automatic judgement of whether your music sounds good.
What does LUFS tell you?
Integrated LUFS describes perceived programme loudness over time using frequency weighting and gating. It helps compare mixes and check delivery plans, but no single LUFS value is ideal for every genre or use.
Sample peak vs. true peak
Sample peak measures stored samples. Reconstructed audio can peak higher between samples. This tool shows sample peak and an estimated oversampled peak when the browser supports it; its estimate is not a certified true-peak reading.
Why check stereo phase?
Negative left/right correlation can indicate signals that partially cancel when summed to mono. Low-frequency phase deserves attention on some DJ and club systems, but stereo bass is not always an error.
What do the EQ percentages mean?
The seven bands describe the relative distribution of spectral energy, not how loud each band sounds to a person. Bass stems, vocals and finished masters naturally have very different distributions.
How should I use crest factor and PLR?
Crest factor compares waveform peak level with RMS level, while peak-to-loudness ratio compares peak with integrated LUFS. They help describe dynamics, but neither is a universal quality score: drums, vocals and club masters have different goals.
Comparing two masters
Save one audio file as the A/B reference, analyze a second file, and compare loudness, peak headroom, crest factor and stereo correlation. The difference describes a change; it does not mean the new file sounds better or worse.
Frequently asked questions
Is the audio uploaded to a server?
No. This page runs file decoding, analysis and report creation on your device. A web host can still receive ordinary page requests, but the audio file is not sent by this application.
Can I analyze FLAC, MP3 and AIFF?
The file picker accepts common audio formats, but actual decoding depends on the browser and codec. If a file fails, try standard PCM WAV using a modern desktop browser.
Is a louder master always better?
No. Loudness, peak safety and transient impact depend on style and destination. An aggressive DJ soundcheck track may intentionally have less dynamic range than an acoustic mix or premaster.
Are the readings certified for broadcast delivery?
No. Loudness uses BS.1770-inspired gating and K-weighting, and true peak is an estimated browser-oversampled measurement. Verify critical deliverables using a calibrated professional meter.
Can I analyze a long DJ set?
The browser must decode the audio into memory. This version rejects files larger than 350 MB and decoded PCM larger than about 320 MiB for stability. Very long sets may need to be exported and analyzed in shorter parts.
Does this tool separate audio stems?
No. It analyzes audio files you already have, including exports of individual vocals, percussion, bass, or complete mixes. It does not extract stems from a finished song.
Is there one correct LUFS target for all DJ tracks?
No. There is no single loudness target for every DJ soundcheck, club track or streaming release. Compare appropriate reference tracks and consult the requirements of your delivery platform. More loudness is not always better.
Why are some readings unavailable?
Silence, very short files, mono material, missing bass energy or browser decoding limitations can make certain loudness, phase or peak measurements inapplicable. Unavailable readings should not be interpreted as zero.
Measurement background: ITU-R BS.1770 and EBU loudness guidance. Not an official or certified implementation.