Uploaded December 2016 | Updated September 2026, 12 hours ago
This is an example of Dolby encoded FM radio with a Dolby calibration tone being played on KSJN 91.1 FM at 8:07 PM on July-8-1978.
This was taken off a 1800ft 7" reel of Shamrock brand tape at 3.75 IPS. Played back using a 1968/69 Sony TC-230. The text "A note about Dolby FM" is from Popular Science magazine April 1978.
This is an example of Dolby encoded FM radio with a Dolby calibration tone being played on KSJN 91.1 FM at 8:07 PM on July-8-1978.
This was taken off a 1800ft 7" reel of Shamrock brand tape at 3.75 IPS. Played back using a 1968/69 Sony TC-230. The text "A note about Dolby FM" is from Popular Science magazine April 1978.
