Sample Alchemy lowpass and highpass filters in Logic Pro for Mac

There are multiple two-pole, four-pole, multipole state-variable, and analog-modeled lowpass (LP) and highpass (HP) filter designs in Sample Alchemy, each with distinctive characteristics that you may prefer for a given purpose. The available LP and HP filter designs include Sharp, Clean, Gritty, and Edgy variants.

  • Sharp: Two-pole analog-modeled filters.

  • Edgy: Two- or four-pole analog-modeled filters. Four-pole variants provide a steeper roll-off of frequencies beyond the cutoff.

  • Clean: Bi-Quad filters.

  • Gritty: Two-pole filters designed to saturate heavily at higher resonance (Res) settings.

Sample Alchemy lowpass and highpass filter parameters

The filter controls have standard functions for all lowpass (LP) and highpass (HP) filter types.

  • Cutoff knob: Set the cutoff frequency for the filter. Higher frequencies are attenuated, and lower frequencies are allowed to pass in an LP filter. The reverse is true when using an HP filter.

  • Res knob: Boost or cut signals in the frequency band that surrounds the cutoff frequency.

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