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SPECTRAL SIDECHAIN PROCESSING

A focused spectral sidechain processor designed to create space only where it matters — fast, visual and musical.

FSW SideFreq interface

FATSAW SOFTWARE

Core features

01External sidechain input
02Spectral ducking
03Real-time frequency display
04Amount control
05Low Cut / High Cut
06Frequency-focused processing
07Sensitivity control
08Sharpness control
09Attack / Release
10L/R and M/S routing
11Preset workflow
12AU · VST3 · Standalone
13macOS · Windows

FSW SideFreq

Inside FSW SideFreq

FSW SideFreq combines spectral ducking, visual feedback and focused controls in one compact processor, making it easy to create space in a mix without relying on heavy full-band sidechain compression.

01 / SPECTRAL ENGINE

See exactly where the sidechain is creating space

The main spectral view puts the sidechain and processed signal in the same workspace. The incoming spectrum drives frequency-dependent reduction while the processed curve shows where space is being carved, so the relationship between source and result is immediately visible. Low Cut and High Cut define the working range, while Amount controls the overall depth without changing the basic balance of the mix.

  • External sidechain drives frequency-dependent reduction
  • Sidechain and processed signal shown together
  • Low Cut and High Cut define the active range
  • Amount scales the overall spectral reduction
  • Designed for kick, bass, vocals and dense arrangements
FSW SideFreq 01 / SPECTRAL ENGINE

02 / ADVANCED & ROUTING

Tune the detector, timing and stereo response

Open Advanced when the basic spectral carve needs more precision. Sensitivity controls how readily the detector reacts, Sharpness changes how tightly the reduction follows spectral peaks, and Attack and Release shape the timing of the response. The routing section then lets you choose conventional L/R processing or switch to M/S for more deliberate control of the stereo image.

  • Sensitivity for detector response
  • Sharpness for broader or tighter spectral carving
  • Attack and Release for temporal behaviour
  • L/R and M/S routing modes
  • Stereo-position control for focused processing
FSW SideFreq 02 / ADVANCED & ROUTING

Part of the FATSAW Software ecosystem

FSW SideFreq

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