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Hi Randy. Can you make short mp3 of just that section? Maybe 10 seconds or so? Then you could use a higher bit rate, and hopefully preserve it better. If you make the section short enough, you can even send it as an uncompressed WAV. I have lots of experience with restoration artifacts - maybe I could help identify it. Low bit rate MP3 can definitely sound like overzealous de-noise artifacts, so maybe that's what it is and why the MP3 encoding seemed to "gloss over" it. Best, Ellis On Mon, Jun 2, 2014 at 6:24 PM, Randy A. Riddle <[log in to unmask]> wrote: > As I mentioned before, I'm working on a discography of Old Time Radio > programs released on lps. > > There's something odd I keep running into with Dave Goldin's Radiola > releases, particularly the later issues that date from the mid to late 80s. > > On some shows, there's an odd momentary "warble" in the sound. It most > often crops up in shows that have some surface noise and I've heard it on > both the lp and cd versions of the albums. > > I was wondering if this was some type of early digital click removal > software or hardware and what it might be. > > I tried making an mp3 of one of the shows, but the compression seems to > gloss it over and you can't hear it very well. > > I'm wanting to note shows in the discography that have this odd "warble", > but I'm not sure how to refer to it. > > It seems to have been used selectively on major scratches - it's not an > artifact of broader digital noise reduction like CEDAR. > > Randy > -- Ellis [log in to unmask] 818-846-5525