DeNoise Plus and DeHiss Plus are the renovation tools designed specifically to remove broadband noise (tape hiss, surface noise of vinyl records, etc.) from audio files. Both noise reduction procedures operate in the frequency domain and are based on the same principles. They differ in the way noise characteristics are taken into account in the process of sound renovation. DeNoise Plus incorporates in the process of disturbance elimination the specific noise characteristic - we call it a noiseprint - extracted from an archive recording. If no reference noise snapshot for a noiseprint evaluation can be indicated, you can use DeHiss Plus - a disturbance rejection procedure based on a standardized noise model. As a matter of fact, you should try out DeHiss Plus even if an archive audio file can be noiseprinted. Based on a standard noiseprint, DeHiss Plus is more robust than DeNoise Plus, in particular, it may yield better results if noise characteristics are time-varying (in cases like that DeNoise Plus may fail to provide a uniform renovation quality along the entire soundfile).
Even though both schemes are not equipped with any explicit mechanism for click elimination, they are capable of removing most of low-amplitude clicks and pops. However, to obtain the best results it is recommended that the audio file be declicked prior to using DeNoise Plus and DeHiss Plus.