I was given two "records" from a USO recording studio made on Dec 22 1942for a GI home on leave to send to his parents. These are on sealed cardboard not vinal. One has heavy static and needle thuds when playing and you can bareily make out the voices. So how do I enhance the voices on this recording. I have tried several things. Some processes did work somewhat but not to my liking. The other is mostly clear and OK. I suspicion the one with static etc was played alot over the years while the other was not. Any help will be appreciated.