Fascinating Casio AT-3 Microtonal Keyboard with great sounds!
The AT presumably stands for "Arabic tones", and also indicates the presence of micro-tonal options in the AT-3.
Objectively though, this is a great keyboard even if you aren't seeking those features. It's got great sound quality, interesting beats, synth editing, effects and even an arpeggiator. There aren't many keyboards that can do this much on their own!
