Perfect Declipper repairs too loud recordings. It does this by calculating the missing (clipped) information from the data that is still available.
Most declippers to date restore spikes based on the last few samples just before clipped audio starts and the first few samples after the clipping ends. While this does restore some lost dynamics, it often does not remove the distortion that is caused by clipping.
Perfect Declipper uses a new algorithm to restore clipped areas in audio recordings. This new algorithm does not only restore the dynamics, but it also removes almost all the distortion. Clipped samples are detected automatically, even if clipping doesn't happen at a constant level.