Michael Shoshani wrote: > 1. Original wax (or lacquer) recording is the master > 2. The metal negative plated from the master is the matrix > 3. The metal positive pulled from the matrix is the mother > 4. The metal negative made from the matrix is the stamper On item #4 did you not mean to say: > 4. The metal negative made from the *mother* is the stamper ... Graham Newton -- Audio Restoration by Graham Newton, http://www.audio-restoration.com World class professional services applied to tape or phonograph records for consumers and re-releases, featuring CEDAR's CAMBRIDGE processes.