Effect: Variety Of Sound - preFIX / Pc / Free

Music Making Software

Variety Of Sound launches preFIX, a free Pre-mixing and audio alignment effect for Windows.

"preFIX is a pre-mixing and audio alignment tool which typically takes place upfront the mixing process. It provides a clever tool set to clean-up, fix and align audio tracks (typically taken from recordings) concerning overall frequency correction, phase alignment, spatial stereo field corrections and routing. It contains a complete gate/expander solution with a dedicated and comprehensive sidechain filtering path as well."

preFIX has these features:

Main audio path filter

  • Baxandall style shelving filter with pristine audio quality
  • Smooth butterworth high- and lowpass filter with switchable characteristics (12 and 24dB per octave)
  • Both are oversampled and match their analog model curve behavior

Sidechain path EQ and filter

  • Whole spectrum “tilt style” balancing filter with adjustable center frequency
  • Smooth butterworth high- and lowpass filter with switchable characteristics (12 and 24dB per octave)
  • A dedicated parametric peaking EQ
  • Internal/external sidechain switchable
  • Sidechain listening option


  • Adjustable threshold between -80 and +6dBFS
  • Freely adjustable knee from hard- to soft-knee behaviour up to 1:2 downward expander mode
  • Range limiting option (floor)
  • Channel link switchable
  • Envelope follower section with attack, hold and release control
  • Attack timing features console style peak timings as well as two rms modes
  • Additional gate pre-open timing option

Phase alignment

  • Analog style stepless signal phase corrections
  • Detailed options for adopting phase response curve regarding polarity, frequency center and width
  • Additional digital signal delay option
  • Phase control switchable to channel 1, 2 or both

Advanced control

  • Detailed output channel routing with six different modes
  • Stereo image rotation option visually supported by a goniometer
  • Output level control with special mono mode to mix in channel 1 and 2
Source via Music Informatory