The AutoTune Toy was written to demonstrate pitch correction using Matlab. To be exact, I was watching Nova one night on PBS and there was a segment on Antares AutoTune software. I thought “I can do that in Matlab!” so this is my attempt at just that. This tool allows you to record short segments of your voice and interactively correct the pitch. Given that the tool uses memory to store the audio data, it is only practical to record short (20 second or less) audio fragments, but it is still a lot of fun to play around with!