GoKawiilCasio's CT-FS1 keyboard uses app to auto-correct wrong notes while playing along
Casio has launched the Casiotone CT-FS1, a $399.99 portable 61-key keyboard featuring 'Feel Sync' technology paired with a companion iOS/Android app. The app analyzes an imported song file and the keyboard then restricts output to notes matching that song's harmony regardless of which key is pressed, while players must still handle timing and rhythm themselves. The keyboard can also split into two zones, letting one person play normally while another uses the Feel Sync assistance.