PSP RetroQ offers PSP Audioware’s unique take on a musical equalizer with unique sonic character and low phase distortion. This makes RetroQ sound smooth and musically natural. Its shelf filters are based on the fabulous-sounding VintageWarmer’s filters, and PSP RetroQ’s addition of a mid-range filter is designed using the same internal architecture. An adjustable high pass filter is added to make the plug-in a complete program equalizer. It was optimized for use on groups and mixes, but it is equally at home in any situation in which you desire some gentle sweetening in your overall processing chain.