Plugin interface — screenshot pending
EQ

Prism

Tokyo Dawn Labs

Where to get itAvailable from Tokyo Dawn Labstokyodawn.net

Prism is a precision frequency analyzer by Tokyo Dawn Labs designed with a focus on human auditory perception. It visualizes audio spectra with flexible sourcing from multiple inputs (main, sidechain, external files, or other Prism instances), offering advanced spectral weighting methods tied to loudness standards, auditory modeling, and masking visualization. Its strength lies in detailed spectrum inspection with human-perceptual accuracy rather than linear frequency analysis.

Written from the manual and checked against it. How we check

Key Features

01Up to four simultaneous plots with independent sourcing, detection, and styling
02Spectral weighting options: No Weighting, Slope (Tilt), Cinema X-Curve, Cinema N-Curve, A/B/C/D-Weighting, ITU-R 468, ISO 226, K-weighting, Groove Geometry (Placement and Velocity), and up to 10 user-defined custom slopes
03Auditory masking visualization based on ISO/IEC 13818-7 (AAC) mechanisms
04Spectral smoothing modes: Raw, 1 Octave, 1/3rd Octave, 1/6th Octave, 1/12th Octave (human auditory filter model/ERB)
05Peak and RMS detection with four timing modes: Fast, Default, Gentle, Slow, plus Infinite mode
06Stereo decoding options: LR Avg (Left/Right average), Left, Right, Sum, Diff
07Ruler tape tool for manual frequency/gain interval measurement
08Ridge Mode to isolate dynamic crests by blocking lower plots

Things to Try

  • 01Hold Shift and drag left or right to scroll the spectrum graph horizontally and examine specific frequency ranges in detail
  • 02Use Ctrl+click (Windows) or Command+click (macOS) on the Filter Magnitude Display to generate and play a sine wave at the selected frequency
  • 03Hold Alt/Option while clicking and dragging to draw a ruler tape for measuring frequency/gain intervals, then hover over the line for detailed start/end point information
  • 04Enable Auditory Masking visualization to see semi-transparent columns indicating which auditory bins are actively masked by competing sounds
Formats
VSTVST3AUAAX
Official Website↗User Manual↗

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Prism by Tokyo Dawn Labs | Plugin Library