Free Online Audio Analyzer for Mixing and Mastering

Upload a WAV, AIFF, FLAC or MP3 file to receive an instant analysis and a downloadable PDF report. No account is required. Your audio is automatically deleted after processing.

SONG MIX MASTER AUDIO ANALYZER

Analyze Your Track

Check key, tempo, loudness, true peak, dynamics, stereo information, frequency balance, and technical audio measurements before mastering.

Drop your audio file here or click to browse WAV, AIFF, FLAC or MP3 · up to 200 MB
Your audio is uploaded securely for analysis and automatically deleted after processing.

What the Audio Analyzer Measures

Key, Scale and Camelot code

The analyzer estimates the musical key and whether the track is major or minor. It also displays the corresponding Camelot code for harmonic mixing.

BPM and tempo candidates

For example, a track detected at 92 BPM may also have a valid double-time interpretation near 184 BPM. The report includes a half-time or double-time candidate when relevant.

Integrated LUFS

Integrated LUFS measures the perceived loudness of the complete track. There is no single correct LUFS target for every mix, master, genre or release platform. Use integrated loudness as a reference rather than a rule.

Short-term and momentary loudness

Short-term loudness measures the average perceived level over a short window. Momentary loudness responds more quickly to changes in the signal. These measurements help reveal the loudest sections of a track.

Loudness range

LRA, describes how much the perceived loudness changes throughout the track. A lower LRA can indicate a consistently loud arrangement or stronger compression. A higher LRA can indicate greater contrast between quiet and loud sections.

True peak

True peak estimates the maximum level that may occur when digital audio is reconstructed during playback or converted to a compressed format. A file can remain below 0 dBFS at the sample level while still producing inter-sample peaks above 0 dBTP.

Sample peak

Sample peak displays the highest individual digital sample in the audio file. It is useful for identifying direct digital clipping, but it should be considered alongside true peak because sample peak alone does not describe possible inter-sample overs.

Crest factor

Crest factor describes the difference between peak level and average level. A larger crest factor generally means that transients stand further above the average signal. A smaller crest factor can indicate a denser or more heavily controlled signal. Genre, arrangement and sound design all influence the result.

Understand Your Track Before Mastering

A mix can sound good in your studio while still containing technical problems that become more noticeable during mastering, encoding or playback on other systems.

The Song Mix Master Audio Analyzer examines important musical and engineering measurements before you release or master your track. It can help identify unexpected loudness, clipping, limited dynamics, stereo phase problems and frequency imbalances.

The analyzer provides objective measurements. It does not decide whether your creative choices are right or wrong. Use the report as a technical reference alongside careful listening.

Why Analyze a Mix Before Mastering?

Technical analysis can reveal issues that are difficult to judge from one listening environment. The report may help you investigate:

  • Insufficient mastering headroom
  • Digital or inter-sample clipping
  • Excessive limiting
  • Unexpected loudness
  • Restricted dynamic movement
  • Stereo phase concerns
  • Unusual low-frequency or high-frequency balance
  • Incorrect sample rate, bit depth or file format

Frequently Asked Questions

An online audio analyzer examines an uploaded audio file and reports musical, loudness, dynamics, stereo and technical measurements. The Song Mix Master analyzer includes key, BPM, LUFS, true peak, RMS, crest factor, stereo correlation and frequency distribution.

No. Automated analysis measures the audio signal, but it does not fully understand artistic intention, emotional impact, arrangement, genre expectations or how the track should relate to the rest of a release. A mastering engineer combines technical measurements with critical listening, monitoring experience and musical judgment.

Get a free mastering demo from Song Mix Master. A mastering engineer will evaluate your track and prepare a short demonstration so you can hear how professional mastering may improve its clarity, balance, impact and translation.

There is no universal premaster LUFS target. The appropriate level depends on the arrangement, genre, processing and available dynamics. Avoid unnecessary clipping or limiting solely to reach a specific number unless that processing is an intentional part of the sound.

Tempo can be interpreted at different metrical levels. A song at 92 BPM may also be detected near 184 BPM because the algorithm interprets subdivisions as primary beats. This is known as a half-time or double-time difference.

Automatic key detection provides an estimate. Accuracy depends on the harmony, arrangement, tuning and musical structure. Songs with modal harmony, key changes or ambiguous tonal centers may produce different results in different analyzers.

Sample peak measures the highest stored digital sample. True peak estimates levels that may occur between samples during playback or conversion. A track can stay below 0 dBFS at the sample level while producing a higher reconstructed true peak.

Yes. After completing the analysis, select Download PDF Report to save a copy of the results.

The audio is processed for the requested analysis and automatically deleted after processing.