This Is a Sound Spectrogram (ca. 1957-1980) by Dust-to-Digital published on 2012-10-12T01:27:20Z "The automatic sound spectrograph emerged from Bell Laboratories after World War II as a powerful new tool for visualizing recorded sounds—it’s the analog ancestor of the digitally rendered spectral displays in modern sound-editing software." — Patrick Feaster, from <i>Pictures of Sound: One Thousand Years of Educed Audio: 980–1980</i> http://dust-digital.com/feaster Comment by FariB Wowzers! 2013-06-07T07:15:04Z