M4RVL MASTERING
STEREO MASTERING PROCESSOR · MK I
master.m4rvl.site
POWER
Drop your mix here, or click to load
WAV · MP3 · FLAC · M4A — the file never leaves this device. Nothing is uploaded, ever.
SOURCE — LUFS
TRUE PEAK — dBTP
CREST — dB
CORRELATION —
MASTER not rendered yet
Your locked preset — the exact chain from your own mastering settings.
EQ · FIVE BAND
RBJ biquads · your frequencies
COMPRESSOR · GLUE
GAIN REDUCTION
soft knee · feed-forward
STEREO · WIDTH
M/S width · mono maker · spectrum
LIMITER · OUTPUT
CEILING −1.0 dBTP · LOCKED
LIMITER GR
lookahead 1.5 ms · true-peak verified
ENGINEER'S NOTES — WHY THE MASTER MOVED
  • Load a track, then let AUTO or RESCUE listen to it. Every move they make lands on the knobs above, with the reason written here. Nothing hides.
0:00 / 0:00
Waiting for a track.

M4RVL Mastering runs entirely in your browser — the same mathematics as the studio preset, verified against reference loudness metering. Ceiling is always −1.0 dBTP.