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TIL that the first two toys to use electronic sound chips to make noise rather than an analogue recordings, Simon and the Speak & Spell, both got their hardware from graphic calculator maker Texas Instruments
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TIL that in the early days of radio, advertisers were hesitant to invest in radio ads because they feared an ad where you couldn't just "turn the page" if you didn't like it (as you could in print) would come off as pushy and invasive
VM0aD
TIL that it is illegal to include the Emergency Broadcast system alert tones in any broadcast media in any context, unless it's coming through the actual Emergency Broadcast System. Even when remixed to sound different, networks can be fined thousands of dollars for each time the tone is broadcast.