Yep. I have some digital files I made of Dire Straits and Joni Mitchell records that sound way better than the CD's that were released later. I bought a CD copy of "Court and Spark" that had some sort of high frequency warbling that made it unlistenable. I gave it away. I also got original mono copies of all the Patsy Cline albums. One had a bit of crackling and the others seemed too rare to mess with frequently so I digitized them. If you don't know already there is a tool called Click Repair (
http://www.clickrepair.net/) that does an amazing job with click and crackle without seeming to affect the music at all. Once you have it set up it can run fast but you can also run it in real time. When running in real time you can listen to the before, after, and what it is removing. This way you can tell if you have the settings to aggressive and you are cutting musical transients. It works like magic. You can download it and run it for a limited time to try before purchasing. If you are going to do many records it's well worth the $50. The GUI is crap but the results are amazing