...but you will NEVER achieve the quality of digital (in terms of noise, distortion, and frequency response).
Some infoMight be good for warped LPs that never made it to CD, I suppose, but probably not much else.
While constructing turntables (the first one in 1980), I was learning all the time aboutmechanical and acoustical properties of materials, how to use and combine theseand find solutions. This enabled me in the beginning of the nineteen nineties tooptimize several CD players, mechanically and acoustically.The mechanical and acoustical aspects are far more important than exchangingcapacitors, resistors, opamps, wires and connectors. I also found out that thephysical properties of the cabinet, especially the way the metal from which thecabinet has been extruded and the cover has been molded, do contribute to thequality and similarity of the individual channels. Already taking out the plastic rodwhich is attached to the power knob at the front of the cabinet, resulted in a moreprecise, less make-believe high frequency reproduction.Applying damping material in certain places in order to control vibrations that interferewith the proper reading of the samples, helped me to acquire a lot of knowledge.First the side panels, the metal top of the cabinet and the mechanics of the tray andthe clamp that holds the CD down were distinctively treated. The next step is todetermine the exact spots were vibrations occur.While damping a Denon CD player with small pieces of bituminous sheet, I followeda specific pattern when all of a sudden the stage opened up, was getting larger anddeeper, the harmonics were improved and transient reproduction (the weakestfeature of the CD format) sounded more exact and natural.The CD player was cheap compared to the high end machines of Mark Levinson andKrell for instance. But when my optimized player was compared to these expensivegiants in the auditorium of a high end shop, the simple player was in the same leaguein every aspect, except for the ultra low frequencies. There the cheap player lackedstrength because of its small power supply. It goes without saying that the player wasa multi bit player with Burr Brown converters.
Already taking out the plastic rod which is attached to the power knob at the front of the cabinet [of the CD player], resulted in a more precise, less make-believe high frequency reproduction.
After trying many possibilities I found that the lighter ring consisting of upper ring + support + acrylic 5 mm ring + 2mm stainless steel ring is the most musical ring.Each and every turntable that the ring was tested on, brought about the precision one would like to have without altering the speed of the signal (liveliness) and the natural color of the instruments, but yet eliminating distortion.The result of this configuration is just that little extra precision what makes the saxophone player a human being, gives the singer soul, and increases the realism of the symphony orchestra. It increases the feeling of ‘being there’. Now one realizes that much of the high frequency content delivered by the cartridge is mere distortion, caused by the minute movement (vibrations) and eventually some distortion from the groove itself.These high frequencies are fantasy-high-frequencies just like the extreme over sampling in digital formats. With the Universal RSR the high frequencies were exact and natural.