"Is it live, or is it Memorex"
In 1961 Memorex was founded.
Memorex entered the consumer media business in 1971 and started the ad campaign, first with its "shattering glass" advertisements and then with a series of legendary television commercials featuring Ella Fitzgerald.
In the commercials, she would sing a note that shattered a glass while being recorded to a Memorex audio cassette.
The tape was played back and the recording also broke the glass, asking "Is it live, or is it Memorex?"
This would become the company slogan which was used in a series of advertisements released through 1970s and 1980s.
https://en.wikipedia.org/wiki/Memorex
Q Drop 1961 attached.