ABX Compressor Test VST

ZynAddSubFX free software-synthesizer by paulnasca 2

ABX Compressor Test VST is a free compressor VST plugin developed by Michael Gruhn Audio. Compatible OS(s): Windows.

ABX Compressor Test is a research VST plug-in that implements 18 different compressor modes – that is 18 more or less significantly different algorithms. It was created to research how a good compressor should sound (and therefore how it must be designed).

All compressor designs are feed-forward and peak-detecting. The side-chain is always not filtered. The signal path is also unfiltered, that is it contains no sound enhancing of any kind (except for the gain adjustment performed by compression).

Different modes
The different modes comprise different envelope follower types, different transfer functions as well as different inter-operation between the internal parts of the compressor. The modes are numbered from 1 to 18, the literals in parenthesis hint at the difference and can be interpreted as follows:

  • HQR = High quality transfer function (ratio).
  • LQR = Low quality transfer function (ratio).
  • S = Smooth operation (release).

Anyone is free to use and share this VST plug-in as long as they evaluate the different compressor modes to the best of their knowledge and report their findings and comments in this thread in the KVRAudio.com forum (where the plug-in is available for download).

http://audio.michael-gruhn.com/

5ORCERY

5ORCERY free compressor by platinumears

5ORCERY is a free compressor VST plugin developed by platinumears. Compatible OS(s): Windows.

5ORCERY is a “meta-multi-band” compressor using dynamic EQ.

5ORCERY takes a different approach to multi-band compression: the signal is still split into separate bands using cross-over filters, and these still feed the side-chains of separate compressors, but the filtered signals are not mixed back together again. Instead the gain modulation signals from all five compressors are matrixed into modulation signals for 4 dynamic shelving filters plus a gain stage.

To put it another way: while this plug-in behaves like a multi-band compressor, and allows you to solve many of the same problems, it is in actual fact a constantly changing 4-band equaliser, and when it isn’t doing anything, it really isn’t doing anything.

platinumears has dubbed this approach “meta-multiband compression”: all the benefits of a multi-band with none of the usual side effects. Use it wherever you like, on channels, sub-groups or mixes.

Features:

  • Transparent and easy to use multi-band compression.
  • Dynamic EQ topology to reduce phase artifacts.
  • Five FL4TT3RY 2 compressors, with band-limited side-chains.
  • External side-chain inputs (switchable per band).
  • Intuitive “solo in place” function for each band.
  • Optional soft clipping keeps your peaks below 0dBFS.
  • Flexible Gain / Gain Reduction meters with switchable range.
  • Zero latency.
Made with SynthMaker

http://www.platinumears.com/plugins.html