Regarding Daniel Sokolow's audio query: It sounds like you have some transcription discs that may be LP but more likely have larger grooves like 2.0 to 2.3 mil which would require a larger stylus. It also sounds like they are the standard aluminum based acetates or lacquer discs. (probably nitrocellulose acetate) It is unlikely they are on a glass base unless they are from the WWII era. You can easily tell by putting them up to a strong light source. If you can't see light through them - like looking through very dark sunglasses- then you can be sure about the base being aluminum. There are two sources to look for transfer information. On is at the CLIR website - the Library of Congress/National Recording Board discussion of best practices for digitizing sound recordings. In short, they need to be cleaned properly (can be a lengthy explanation) and played back with the appropriate sized stylus and playback equalization. NBC recordings are pretty standard. Broadcast WAV files at 96 kHz 24 bit are recommended for archive transfers with standard CDs as reference copies. The other source you may also want to get a hold of the IASA (International Association of Sound and Audiovisual Archives) guidelines on digitization. You should not play them back unless they are properly cleaned (Keith Monk's record cleaning machine if possible) and you have the right size stylus and equipment. Since these are instantaneous recordings the coating is softer than your average LP or certainly commercial 78 rpm disc. As a result any playing will produce more wear and tear risking sonic loss for subsequent playing. Andy Lanset Archivist WNYC New York Public Radio One Centre Street New York, NY 10007 (212) 669-4685 [log in to unmask] A posting from the Archives & Archivists LISTSERV List sponsored by the Society of American Archivists, www.archivists.org. For the terms of participation, please refer to http://www.archivists.org/listservs/arch_listserv_terms.asp. To subscribe or unsubscribe, send e-mail to [log in to unmask] In body of message: SUB ARCHIVES firstname lastname *or*: UNSUB ARCHIVES To post a message, send e-mail to [log in to unmask] Or to do *anything* (and enjoy doing it!), use the web interface at http://listserv.muohio.edu/archives/archives.html Problems? Send e-mail to Robert F Schmidt <[log in to unmask]>