Plugin interface — screenshot pending
Filter

Infrasonic

Tokyo Dawn Labs

Where to get itAvailable from Tokyo Dawn Labstokyodawn.net

Infrasonic is a specialized high-pass filter by Tokyo Dawn Labs designed to address inaudible low-frequency regions in mixes, ideal for media transfer to lower-bandwidth formats like mastering, cassettes, and P.A. systems. It operates in minimum or mixed phase modes with continuously variable slope control and dry mix options, featuring creative loss-compensation methods including dynamic bumping and harmonic generation to maintain perceived fullness despite filtering.

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

Key Features

01High-pass filter with continuously variable slope (3–48 dB/Oct)
02Minimum phase (zero latency) and mixed phase (linear response above 50 Hz) modes
03Filter Invert converts high-pass to low-pass for subwoofer creation or content audition
04Even Harmonics, Odd Harmonics, and Subharmonic exciters to replace filtered energy
05Dynamic Bump with up to +6 dB boost to compensate for filtering loss
06Low Clamp for distortion-free clipping of low-frequency signals
07Real-time spectrum analyzer with DC level detection
08Three processing quality modes (Eco, Precise)

Things to Try

  • 01Use Filter Invert to isolate and audition the removed low-frequency content before committing to the filter
  • 02Enable Dynamic Bump and adjust the percentage to compensate for energy loss introduced by steep filter slopes
  • 03Switch between Minimum Phase (for zero latency) and Mixed Phase (for linear phase above 50 Hz) depending on whether phase distortion or latency matters more for your application
  • 04Combine Even, Odd, or Subharmonic exciters to creatively restore perceived bass character after high-pass filtering

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Infrasonic by Tokyo Dawn Labs | Plugin Library