I guess there are now digital amplifiers, but I know even less about those than about analog amplifiers. A CD transport is what spins a CD and reads the digital information stored on the CD. A DAC is what translates the digital signal into an analog signal. And a CD player combines the transport and the DAC into a single chassis.
One of the most popular versions of Cinderella was written by Charles Perrault in 1697. The popularity of his tale was due to his additions to the story including the pumpkin, the fairy-godmother and the introduction of glass slippers.
The Brothers Grimm wrote/archived the original fairy tales. Many of the stories that the Brothers Grimm had been passed down for generations already, so it's unlikely the stories they heard were the originals..Perrault, by the way, published his fairy tales over a century before the Brothers Grimm did. Perrault's book Tales of Mother Goose was published in 1697; Grimm's Fairy Tales was published in 1812.). The only fairy tale Disney expressly based on a Brothers Grimm story was Snow White.