TWELVE KEYS - WHAT IS IT REALLY? in TwelveKeys Posted January 21, 2009 I've just started using 12 keys. It's not at all what I thought it would be. Surely, I'm not unusual in reacting this way. Regardless, all it does for me is show a string of lines or dots when I run a recording through it. What can I possible do with this, and what are the piano keys for?