Audio and Microcontrollers

This text describes way to play audio with microcontrollers, Arduino or stand alone Attiny45 or even smaller Attiny13a. The text starts with soundgadgets. It tells about 8 bit sounds, about Soundshields. In the end it will take a raspbery Pi for playing better quality sound and explain what you have to do with the Raspberry Pi to make it play soundfiles with an LDR activation.