Need Help in simple Hardware Audio player

Hi There!



Do you remember the singing toys that play music and short songs you had when you were child ? Didn't you buy one to your son or daughter...



Any idea on how it works ?



It's a simple infinite loop voice player with low quality, but what is the components of its circuit ?



is there any coding technique used for the song or it is just sampled by a low bit rate and how much this rate ?



Any idea :!:



Thanks



Amr