Excerpt from a 78 of Percy Grainger playing a Chopin sonata. A 1925 shellac disc from the early days of electrical, rather than acoustic, recording.
The record was not in very good condition, having been played extensively. (Why else would you buy a record 80 years ago?) Declicked using Default 78 setting. General noise reduction using DeNoise, with the noise floor and profile set by sampling the lead-in track. Noise reduction up to 18dB.
Notice that a lot of low-frequency noise in the original stereo file is greatly reduced in the declicked file. Simply capturing in mono, or using an audio editor to do the mono mix-down, would not achieve such good results as the automatic dynamic merge algorithm available in ClickRepair.
Original record given to me by a friend.