SoundMaxer.ai AI-Powered Professional Mastering

Fully accurate peak-level waveforms for both input and output are decoded directly via the Web Audio API — no placeholders, no fakes. You see every transient exactly as it sits in the file.

After mastering completes, the output deck shows Integrated LUFS and True Peak (dBTP) measured by FFmpeg's loudnorm filter. Know exactly how loud your master is before you upload it anywhere.

Tap A/B to instantly flip between the dry original and the mastered output at the exact same playback position. The most important QA step in mastering — hear the difference in real time.

Choose the platform you're releasing on and the loudnorm FFmpeg filter targets its exact LUFS spec automatically. Spotify is −14, Apple Music −16, SoundCloud −8, and MAX pushes to −6 for in-your-face club levels.

While SoundMaxer processes your track, a smooth animated progress bar walks through each stage: Analyzing → 10-Band EQ → Compressor → Stereo Widener → Loudnorm → Done. You always know where you are.

Drag an audio file onto either deck — the input panel loads your target track and decodes a real waveform instantly. Drop onto the output panel to set a reference. Works with WAV, MP3, FLAC, AIFF and more.

Hit Auto Master and SoundMaxer analyses the BPM of your track using Librosa, picks the best genre preset automatically (Jazz < 80 BPM, EDM 130–145, Trap 145+), then runs the full mastering chain unattended.

Every knob, button, fader and section has a plain-English tooltip explaining exactly what it does, the frequency range it affects, the valid value range, and what to listen for — no manual needed.