Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Remco Electronic Sound FX machine

SFX
The Remco Electronic Sound FX machine was based on the Texas Instruments SN76477 analog sound effects chip. This little late-1970s integrated circuit generated square and noise waves that could be modulated to create all manner of bleeps, bloops, buzzes and auditory insanity. It's perhaps most famous as the sound chip used in the arcade version of Space Invaders.

Several toy makers seized on its simple design and $3 price tag, but Remco went a step further by using it to create a bizarre battery-powered sound effects machine capable of generating an enormous range of parent-repellent sounds. The booklet includes pages of bizzare patch settings, although it would be much more fun to muck around without guidance. I suspect more than one impressionable kid graduated from this box to a full fledged musical synthesizer.

There's one on eBay right now at a stratospheric price [via Matrixsynth]
Experimenting With A Sound-Effects Generator [Popular Electronics, May 1980]

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