Low-pass filtering

Spectral Pocketing

Low-pass filtering rolls off high frequencies from an instrument, sample, or effect bed to make it sound dark and isolated in the lower register. Removing these higher frequencies preserves headroom and clears space in the upper spectrum for lead vocals or other melodic elements.

How the songs in the archive use it

In One Dance, Noah Shebib applies a 24dB/octave low-pass filter cutting above 1kHz to isolate piano chords beneath the upcoming lead vocal, while Black Milk rolls top-end frequencies off drum samples to leave the highs open for vocals.

How to do it in Logic Pro

Low-pass filtering cuts high-frequency content to create a darker, warmer sound. Use it to push background layers back in the mix or clear room for bright lead elements.

  1. Insert Channel EQ on the audio track.
  2. Click Band 8 On/Off to activate the low pass filter band.
  3. Adjust Frequency to sweep down and remove unnecessary highs.
  4. Adjust Q to shape the resonant curve at the cutoff point.
Plug-inControlValueListen for
Channel EQBand 8 On/OffOnactivated high-frequency rolloff
Channel EQFrequency4000 Hztamed highs and darkened timbre
Channel EQQ0.71smooth, non-resonant filter cutoff

A general method with Logic Pro's own plug-ins. Control names are checked against Apple's manual; the values are starting points, so adjust them by ear.

Songs that use it (3)

What each track sheet's analysis found, with the sheet's own score. Analysis, not verified credits.

More Spectral Pocketing techniques

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