AUDIO STUDIOG / P / L
Audio Mastering
Balance your sound, adjust loudness and download a mastered WAV or MP3. Your audio stays in your browser.
No uploads · No sign-up · No AI model downloadChoose audio → Adjust → Save
1. Choose your track
MP3 and WAV, mono or stereo. Up to 200 MB and 10 minutes. Processing and exports use 48 kHz. 1 MB = 1,000,000 bytes.
Long tracks need more memory. If your phone struggles, try a computer.
Choose a track to see its waveform and measurements.
Original
Use the A/B player below to compare at the same position.
Track diagnosis
Broad frequency energy and dynamics guide the starting settings. This does not detect genre or separate instruments.
View measurements (optional)
LUFS uses K-weighting and gated 400 ms blocks. This meter is not certified. Sample peak is not true peak.
2. Shape your sound
3. Listen and compare
Switch A/B to hear the part you just heard again. Each switch rewinds by the time below while keeping playback or pause.
What changed
Approximate energy shares, not an EQ curve. Listen at matched loudness to judge tone and dynamics.
Only the selected section is processed for this preview. Its loudness can differ from the full-track result. Master the full track to download WAV or MP3.
The settings or selected section changed. Generate another preview to hear the update.
0 keeps the current position. Choose 0–30 seconds; the beginning of the track or repeating section is the limit.
Mastered
Playback volume matching does not change your downloads. Only one player plays at a time.
Listen for clear vocals, distinct kick and bass, and comfortable highs. Compare the same section at matched loudness. Playback volume and looping do not change your download.
Mastered measurements (optional)
LUFS uses K-weighting and gated 400 ms blocks. This meter is not certified. Sample peak is not true peak.
Settings changed. Master again to update the result.
How to use it
Choose a track, review the diagnosis, pick a sound and intensity, compare a short A/B preview, then master and download the full track.
Know the limits
This is a mastering assistant, not source separation or audio restoration. It cannot recover detail lost in an MP3 or repair an already clipped mix. MP3 encoding can change peaks; check the exported file before release. No platform acceptance or professional mastering quality is guaranteed.
Phones can process shorter tracks, depending on memory and browser codecs. Keep this tab open while processing. Files and song names are not sent to a server or analytics. Downloads do not retain the original tags or cover art.
MP3 encoder licenses and source
wasm-media-encoders-MIT.txt · lame-LGPL.txt · wasm-media-encoders source · LAME source