The turntable is made from optic mouse and disk that can b rotate. There is software in matlab that catch mouse motion and transform it to sound. This disk simulate gramophone record play as vinyl disk. It is possible to make scratch effect. It is possible to load any wav-file. Massive disk is important here, it makes more natural scratch sound.
Mouse cursor is looped on the screen: if it go down limit then it jump up automatically.
run run_me.m You will be asked to select wav-file. Sometimes first run not work, I don't know why, so run it again. Push big "Stop" button to stop the program.