[smelterdemon]

I had always assumed that Auto-Tune had evolved from or was an advanced form of Vocoder (likely from the similar "robot" effect extreme applications of Auto-tune gives).

I've been working on a relatively simple real time music/audio processing project on an Arduino (identifying tempo and using it to create interesting lighting effects for a Halloween costume) and it's an interesting challenge. Extracting any kind of useful information about the underlying musical structure from polyphonic audio is an incredibly hard problem. Add to that limited hardware and the kind of sampling rate you need to capture music (upwards of 40kHz if you want to capture everything you can hear) and you have to get creative.

[soylentcola]

It's definitely a challenge with something like a microcontroller. My coding skills are borderline nonexistent (but then again, that's part of why I'm experimenting with Arduino in the first place) but I've messed around with using some FFT code published by others to get audio to affect some LED strips. So far the results have been mixed.