George Paul, I really appreciate your post as I never knew that there were different types of unground records. I also appreciate the answer about the sound, I read that tone test records got extra condensite to reduce the surface noise, now I know it did. I am always appreciative that you share your knowledge, thanks so much. Steve > Steve:> Yes, all 5 of the "unground edge" discs here have etched labels of the > two later patterns, and none of them have the same selection on both sides. > Judging the various sides is naturally subjective - after all, a particular > side might simply be less worn than its inverse. But it seems to me that a > couple of the discs have smoother surfaces on one side and slightly less surface > noise, as though the finish is thicker. > According to Ray Wile's "Edison Disc Recordings," at least two of > these discs were used for Tone Test demonstrations (I haven't checked the other > three).> > George Paul> _______________________________________________>