Totally free mastering and filtering — AI generators render gorgeous songs into a frequency ceiling — the shimmer above ~13 kHz simply isn't there, the low-mids congeal, and the dynamics arrive flattened. Lustre listens first, diagnoses your track, then rebuilds the missing spectrum with harmonic reconstruction — entirely in your browser. Nothing is uploaded anywhere.
Every stage is tuned by what the analyzer actually hears in your file — not a one-size preset. The order below is the signal path.
Measures integrated loudness (K-weighted), true crest factor, stereo correlation, low-mid congestion, and — crucially — the exact frequency where your generator gave up.
Tempo, beat periodicity, sub weight, transient density, spectral flatness and vocal presence feed a classifier that guesses the genre — then reshapes every stage below to match. It shows its guess; you can overrule it.
Adaptive cuts in the 400–800 Hz mud and the 5–8 kHz digital fizz, sized to the measurements. A sub-shelf and a low-end harmonic bus restore the weight generators undersell.
Bass folds to mono below 130 Hz to kill phase smear, the sides open above it — and a modulated dual-delay dimension engine blooms your mono content out into the stereo field. The big, glossy, Flume-scale width.
The signature move: upper-mid harmonics are excited through an asymmetric waveshaper and folded back in above the detected ceiling — regenerating real, musical air where the AI left silence.
Two sub-audible LFOs gently wobble level and tilt (±0.2 dB, ~8-second cycles), breaking the eerie spectral regularity of generated audio. Your ear reads it as "alive".
Tape-style saturation, a slow glue compressor, a crushed parallel bus for density, then loudness normalization through a lookahead true-peak limiter to your chosen target.
Whole-track retune by high-quality resampling — from real Baroque pitch to the solfeggio "528". Honest note: no controlled study shows any tuning is objectively "healing" — but tuning is taste, and the loudness-matched A/B lets your ears judge fairly.
Describe the feeling you're chasing in plain words — with lyrics if you have them. The resident engineer reads your track's measurements, reads the song, then sets every fader, vibe, tuning, and texture on this console itself and renders. Prompting, but the output is sound. Opening soon.
Physically modeled patina: vinyl wow at exactly 0.75 Hz (one wobble per 45 rpm revolution) with dust ticks and surface hush, or tape with 60 Hz head bump, hiss and flutter — the noise runs through the glue so it sits in the master, not on top of it.