In music production, audio restoration is the process of repairing or enhancing audio recordings that have been damaged or degraded over time. This can include removing clicks, pops, hisses, hums, or other unwanted noise, as well as repairing damaged or distorted audio. Audio restoration techniques can range from simple tools such as noise reduction filters to more complex processes such as spectral repair, where individual audio frequencies are analyzed and adjusted. Audio restoration is an important tool for preserving and restoring historical audio recordings, as well as for improving the quality of modern audio recordings.