Soundness ( has debuted SoundSoap 4, an update to their audio noise reduction software for Mac and Windows.

The software helps solve audio noise problems like unwanted hiss and background noises, clicks, pops, crackles, electrical hum, rumble, clipping, and low volume. Version 4’s new Declipping feature automatically fixes distortion on audio that was recorded too loud, using an advanced digital signal processing algorithm to detect and restore clipped audio signals. SoundSoap 4 now features an advanced loudness maximizer to intelligently boost the volume of audio tracks that are too quiet. SoundSoap’s digital signal processing algorithms increase the loudness of the audio without introducing distortion.

SoundSoap 4 also includes a new feature called Track that automatically reduces the amount of noise reduction on louder sections of the audio material, effectively increasing the amount of noise reduction that can be applied. The software now saves WAVE and AIFF files in 24-bit format on the Mac.

SoundSoap 4 includes the standalone application and plug-in versions, and costs US149. Previous owners of BIAS SoundSoap can upgrade to SoundSoap 4 for $49. Customers who purchased SoundSoap 3 on or after Sept. 1, 2014 will be provided a free upgrade to SoundSoap 4.