PLParEQ is a 10-band Phase-Linear Parametric Equalizer. Each filter may assume any of many different filter characteristics and operate in either traditional phase-warping mode or Refined Audiometrics' phase-linear mode. It uses the same internal DSP core as all of Refined Audiometrics other high-end products. Audio streams are treated in either stereo or mono. Individual filters can be applied to either or both stereo channels, middle only or side only. Phase Linear Operation is achieved by processing your sound in both the forward-time and reverse-time directions through classic filters - al... [more]

PLParEQ1 is a stereo 1-band "ultra-high quality" Parametric Equalizer filter. Feature highlights: Internal 88.2/96kHz processing (even for 44.1/48kHz external sample rates). Stereo LPF, BPF, BRF, HPF, Peaking/dipping, LowShelf, HiShelf. Phase-Linear or traditional phase-warped filtering. ... [more]

PLParEQ3 is a 3-Band Phase Linear Parametric Equalizer. It is identical in every respect to the 10-band version, but limits the number of bands that can be used, the maximum quality level is restricted to 5 and lower, and only the simple 2-pole conventional filters are offered.... [more]

PLParEQ4 is a 4 band version of PLParEQ1 (Minus the GUI).PLParEQ4 is a stereo 4-band "ultra-high quality" Parametric Equalizer filter. Feature highlights: Internal 88.2/96kHz processing (even for 44.1/48kHz external sample rates). Stereo LPF, BPF, BRF, HPF, Peaking/dipping, LowShelf, HiShelf. Phase-Linear or traditional phase-warped filtering. ... [more]

System 1200 is a "light" version of Refined Audiometrics Laboratory's Systems 2000 and 5000, suitable for use on personal computers as a VST plugin. It restores lost hearing for musical listening for those who have blown their ears or otherwise lost some (or a lot of) hearing acuity. Corrections are handled in stereo at 44.1 kHz sample rates, with 50 overlapping Bark bands and 4-fold temporal overlap processing, to push inter-modulation distortion products more than 80 dB below the signal levels. Corrections are updated at approximately 1 KHz rate. A sophisticated physics and hearing... [more]