This is our demo track: VELDT, “Undertow.” Every number on this page was measured from its audio — exactly what you get for yours.

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This will fight the lathe.

Target: LP (90°)

Phase correlation over time, broadband and low-frequency

CUTTING SHEET — input.wav
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format          : 44100 Hz / PCM_16  (02:19)
level           : -12.9 dB RMS | true peak -0.1 dBTP
phase (broad)   : worst 127° (r=-0.601)
phase (<200 Hz) : worst 80° (r=+0.175) | LF side level -23.9 dB
width (S/M)     : -7.3 dB
HF risk         : LOW (RIAA-emphasized peak +0.5 dB)
subsonic <20 Hz : -25 dB rel. total

verdicts:
  [FAIL] NEEDLE SKIP RISK — LF (<200 Hz) correlation hits 80° (bass limit 60°)
  [FAIL] EXCEEDS 90° — broadband correlation hits 127°
  [OK  ] Level: -12.9 dB RMS
  [OK  ] HF/sibilance risk low (emphasized peak +0.5 dB)
  [WARN] Subsonic content <20 Hz at -25 dB rel. total (filter available, default off)

proposed corrections (not applied):
  - elliptical EQ, side HP @ 100 Hz (12 dB/oct, zero-phase, mid untouched)
  - side gain 0.522 (-5.6 dB)
  - width delta if applied: -7.1 dB

measurement method: sliding Pearson correlation, 400 ms window / 100 ms hop, worst-case reported, silence gate -60 dBFS. Phase angle = arccos(r). LF meter band-limited <200 Hz (zero-phase), side-energy gated at -35 dBFS (correlation is level-blind; vertical groove modulation is proportional to side amplitude).

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The Mastering Kit renders streaming masters for every platform plus a vinyl-safe 24-bit cutting master with the full sheet — from this same upload.

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