Home › What is vinyl pre-mastering?
A record groove is a physical object with physical limits. Vinyl pre-mastering is the work of fitting your music inside them: taming the low-end width, the sibilance and the level that a digital master carries without a second thought — before the cutting engineer has to do it for you, their way.
A stylus traces a groove whose side-to-side motion is the mono part of your signal and whose vertical motion is the stereo difference. Big out-of-phase bass means big vertical excursion — which at some point lifts the needle out of the groove or makes adjacent grooves collide. Loud, long sides force grooves closer together, so level trades directly against runtime. And as the stylus approaches the label, groove speed drops, so high frequencies have less physical room: bright sibilance that streams cleanly distorts on the inner tracks.
Four moves cover most of it. Elliptical EQ narrows the stereo image below roughly 100–300 Hz — the lows become mono-compatible while the rest of the image stays wide. De-essing and HF control keep sibilance inside what the inner grooves can reproduce; the risk is frequency- and position-dependent, which is why serious checks weight it with the RIAA curve. Level and length budgeting sets a realistic cutting level for the side's runtime. Subsonic filtering removes inaudible content below ~20 Hz that would eat groove excursion for nothing.
The measurement behind the first move is stereo correlation — specifically in the low band, where cutting engineers want it close to mono.
Because the plant will either cut it quieter than you expected, "fix" it with their own processing you never hear until the test pressing, or send it back. A streaming master is optimized for loudness-normalized digital playback — the one environment with none of vinyl's constraints. Checking the specific failure points before you ship the file costs minutes; a surprise at the test pressing costs weeks and money.
Phase, RIAA-weighted sibilance, level, subsonics and pre-echo, scored against real pressing-plant limits.
Run the free vinyl checkUsually yes, at least a verified one. Some digital masters happen to be groove-safe; most modern ones are too loud, too wide in the lows, or too bright in the sibilance region. Measure first — if it passes, ship it.
A filter that folds the stereo difference signal to mono below a chosen frequency, leaving the mid signal untouched. The bass tightens into the groove's horizontal plane; the width above stays.
It matters more toward the end of any side. Inner grooves move slower under the stylus, so the same 8 kHz sibilant has less vinyl per second to live in — sequencing bright songs early on a side is a classic cutting trick.
A file with honest levels, groove-safe lows and controlled sibilance — plus per-side runtimes. A cutting-safety report answering exactly those questions is what our free check produces.
The meter that decides mono and vinyl compatibility.
The loudness unit behind every platform's normalization.
Inter-sample peaks, dBTP, and the -1 dBTP ceiling.