Anyone care to give a thumbnail sketch of what sampling rates would be necessary to digitize the signals on recording media (3 1/2", 5 1/4", 8" floppy, hard disks, drums, disk packs, etc.) at sufficient rates to preserve the encoding for post-processing in other tools? -- Paul Pierce is using this technique to recover data from 7 track tape. The only problem I see is people on this list underestimate the costs involved in putting something together that works. For the most part, analog level recovery isn't necessary. Modern digital data separators will recover most media, which reduces the data rates substantially. http://www.piercefuller.com/collect/proj.html