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File: QuadraDisk.jpg

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Summary

Description An RCA QuadraDisc recording. The color fringes around the reflections are caused by the ultrasonic signal that carries the difference information used to separate the four channels.
Date
Source Own work
Author Bob DuHamel

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3 January 2008

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current05:12, 4 January 2008Thumbnail for version as of 05:12, 4 January 20081,321 × 1,269 (1.15 MB)wikimediacommons>Rsduhamel{{Information |Description=An RCA QuadraDisk recording. |Source=self-made |Date= |Author= Bob DuHamel |Permission= |other_versions= }}

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