What do you think causes the crackle and clicks we hear?


I think pops are easier to understand but clicks and crackle noises, what causes this?
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I had a Coda Fet 02b preamp about 20 years ago which I bought directly from Coda since they had a large number of circuit boards on hand after the model was discontinued so they did a limited manufacturing run to use the spare inventory up.  They were selling them for just under 50% of the original list price.

When I received it there was on input selection which made a noise when I switched to it.  I called Coda up and complained and the tech told me it was most likely an impedance miss match between the cables and the preamp input.  So I swapped the cable to a different input selection and the noise followed it.  After I replaced the cable the sound disappeared and I used that preamp for over 12 years.
Despite @geoffkait’s statement, it works. I won’t dispute his infinite knowledge and omnipotence, but it works. The Talisman stops the clicks and pops no matter what it does or how it works. I never said it's anti-static, don't put words in my mouth, I said it mitigates the noise caused by static electricity. For more information https://walkeraudio.com/. The designer helped NASA solve the static electricity problems that, combined with raw oxygen, blew up Apollo 1 with the three astronauts in it. His invention comes directly from that experience, thank you very much.
NASA? Aren’t they the ones who blew up a bunch of astronauts in the Shuttle? Actually In two Shuttles. No thanks, dude!
Oh omnipotent one, thou dost not read the post. I said he he fixed it, . You're welcome! And, have a nice day.
One day perhaps you will see 👀 the difference between neutralizing a static electric charge and degaussing a magnetic field. But perhaps not. Stay in school, scooter.