Audio restoration is the process of restoring a damaged or outdated sound recording to bring it as close as possible to its original condition. This can be accomplished by removing noise, pops and crackles, sound recording errors, and other types of interference. It can also help improve sound quality by adjusting volume and tone. Audio restoration is an important process to preserve and make accessible historical and cultural sound recordings. It is a specialty that requires sound engineering skills and an understanding of sound aesthetics. sound aesthetics.