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Hi Erik, There is no "one size fits all" when it comes to playing back any type of disc, including opposite sides of the same disc. It all depends on the type and condition of the source. Sounscriber discs are somewhat unique in that the grooves were embossed as opposed to being cut so most often you don't have the same choices when it comes to playing above or below the wear. The groove width is about 3 Mils however, the embossed groove is much shallower than conventional discs and is "U" shaped as opposed to the "V" shape of traditionally cut discs so typically you wind up with a narrower stylus to keep groove contact. That said, start with a stylus of about 3 Mils and work your way into a narrower stylus from there. It will come down to using the widest stylus that will track the groove. Wider styli will produce better signal-to-noise than narrower styli. The fidelity will be poor no matter what: About that of a 1950's analog telephone. Keeping the stylus in that embossed groove is the holy grail here so make a spindle adapter for the square center hole (if needed) and make it as accurately as possible to keep the disc centered which will help with tracking. Sometimes playing the disc at 16-2/3RPM and doing the pitch correction after the fact is the best answer. These discs are very thin and sometimes with this type of disc I have used some distilled water between the disc and the turntable (the catalyst affect) to keep it as flat as possible. Hope this helps, Corey Corey Bailey Audio Engineering www.baileyzone.net On 8/26/2016 7:28 AM, Erik Dix wrote: > Hello! > > I am trying to find out what size of stylus would work best with the > playback of green soundscriber discs. > > Any help is greatly appreciated, > > Erik Dix > Notre Dame Archives >