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Line 17: ==How to Tell== * Most tapes duplicated at GTK Duplicating Co. were duplicated on cassettes manufactured in either China or Taiwan, and had the audio track ~~duplicated~~ in linear only, although many SP tapes duplicated at this arm ~~after early 2003~~ did have a hi-fi audio track in addition to a linear track. * Post-1986 tapes have a black screen test pattern with the 1000 Hz tone at the end. * Pre-1998 tapes have the record tab intact, while post-1998 tapes omitted it.

GTK Duplicating Co.: Difference between revisions

GTK Duplicating Co. (edit)