As a teenager growing up in the prog rock era of 70s in a darkened room with headphones you were never short of mystery keyboard sounds.

I would read the back of the LP sleeves and try to imagine some of the strange instruments listed such as VCS3, RMI, Moog Bass, ARP2600 and The Mellotron.

I began even to recognize the jerky orchestral tones of a Mellotron, always visibly distinctive on stage as a white kitchen cabinet of a keyboard. John Paul Jones had one on the Led Zep Poster on my bedroom wall. Rick Wakeman had two to rest his Minimoogs on. The word Moog originally covered anything I couldn't identify, because I believed these new "Synthesizers" to be chameleon like and therefore possessing the ability to sound like anything.

I later found out that this was not true. A Moog sounds uniquely like a Moog and an ARP Odyssey sounds more like a Moog coming out of a fairy liquid bottle. It was more of a citrus sound to the Moog’s full flesh mango goo. A Fender Rhodes Piano had that ubiquitous mellow thuddy chime - the sound of Galaxy chocolate. This was supported by Stevie Wonder who said it had a "brown sound" (he sees sounds as colors). He used all of these sounds on his 70s albums . I bought these from my local Woolworths on the day of release, because I was getting obsessed. Stevie had it all going on...

Source: The Quietus