Analog clicks can occur due to dirt and dust on the grooves of the vinyl record or granularity in the material used for its manufacturing, or through damage to the disc from scratches on its surface.
Also, clicks can be caused by electric devices near the computer or by faulty audio or mains cables.
[4] In sample recording, digital clicks occur when the signal levels of two adjacent audio sections do not match.
[8] While in voice-over recordings, click noises are undesirable, they can be used as a sound effect of close-miking in ASMR and pop music, e.g. in Bad Guy (2019) by Billie Eilish.
[13][14] A spectrogram can be used to visually detect clicks and crackles (corrective spectral editing).