The Sonoris EQ Bundle is a set of two plugins: the Mastering Equalizer and the Parallel Equalizer.

The Sonoris Mastering Equalizer (SMEQ) is a parametric equalizer in VST, VST3, AU, AAX and RTAS format for Windows and Mac. It has selectable linear phase or minimum phase operation per band. The plugin is suitable for mixing and especially mastering and features 7 bands, including lowpass, highpass, peaking and shelving filters.

The SMEQ can be used to enhance or correct difficult material like vocal or instrumental soloists and groups, orchestral recordings and complex mixes, without introducing any unwanted coloring. The linear phase implementation of the SMEQ ensures a transparent character and just boosts or cuts a frequency range without adding a "sound". It doesn’t smear transients or create mud, nor does it alter the imaging and depth information of the original sound. This way it is possible to boost or cut more than with a conventional equalizer without any of these negative side effects.

The Sonoris Parallel Equalizer (SPEQ) is a minimum phase parametric equalizer in VST, VST3, AU, AAX and RTAS format for Windows and Mac. The plugin is suitable for mixing and especially mastering. It has fixed filter types on each band and band 2 to 6 are connected in parallel. The filters are build in a feedback/feedforward manner to provide cutting and boosting, like in analog graphic equalizers. Band 3 to 5 are constant-Q bells and 2 and 6 are shelves. Band 1 and 7 are low/high cuts and connected in series with the rest.

The main feature is that this eq is a lot more subtle and needs more work to set up right because there is some interaction between the bands. In normal series connected eq's the gains of two bands just add up but in a parallel eq it doesn't. The filters are parallel to each other as well as the unprocessed signal and this makes that if you have for example a low shelve boost and switch on a low freq bell boost too, it just doesn't do much more. You can't easily overdo things, but have to work harder to get it right. Also, the signal path is cleaner because the filters al work on the same input. The filters have correct gain up to Nyquist.