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.

Highlights
1. smoothest audio frequency filtering
2. comprehensive gate and expander audio treatments
3. detailed phase corrections
4. easy routing and stereo imaging changes

Plug-in specification
1. Win32 / VST compatible
2. state-of-the-art digital signal processing
3. performance-critical parts are written in assembler
4. completely SSE optimized

Features:
Main audio path filter
1. Baxandall style shelving filter with pristine audio quality
2. Smooth Butterworth high- and lowpass filter with switchable characteristics (12 and 24dB per octave)
3. Both are oversampled and match their analog model curve behavior

Sidechain path EQ and filter
1. Whole spectrum "tilt style" balancing filter with adjustable center frequency
2. Smooth Butterworth high- and lowpass filter with switchable characteristics (12 and 24dB per octave)
3. A dedicated parametric peaking EQ
4. Internal/external sidechain switchable
5. Sidechain listening option

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

Phase alignment
1. Analog style step-less signal phase corrections
2. Detailed options for adopting phase response curve regarding polarity, frequency center and width
3. Additional digital signal delay option
4. Phase control switchable to channel 1, 2 or both

Advanced control
1. Detailed output channel routing with six different modes
2. Stereo image rotation option visually supported by a goniometer
3. Output level control with special mono mode to mix in channel 1 and 2

The license of this software is Freeware, you can free download and free use this music mixer software.