Casio's new keyboard listens to your music and corrects your notes as you play

Casio has launched the Casiotone CT-FS1, a 61-key portable keyboard with a new feature called Feel Sync that adjusts the notes a player presses to match the harmony of a song in real time. The keyboard is on sale in the US at $399.99 and arrives across Europe this month at €399 in Midnight Black (CT-FS1BK) and Alpine White (CT-FS1WE).

Feel Sync runs through a companion app for iOS and Android. Players plug the bundled WU-BT10 Wireless MIDI and Audio Adapter into the keyboard, pair it with the app over Bluetooth, start a song, and play along in time. The app analyzes each track's chord progression, melody, and rhythm, and Casio's algorithm shifts the triggered notes so they fit the music. Players still control the rhythm, dynamics, the part of the keyboard they use, and how many notes they press at once.

The app features a catalogue of 70 songs, and the keyboard has five built-in Feel Sync demonstration tracks. Users can also import MP3, WAV or AIFF files stored on a phone or tablet, although streaming services are not supported. The Feel Sync app goes live in Europe on November 11, with Serbia, Moldova, North Macedonia, Albania, Kosovo, Bosnia and Herzegovina, and Ukraine to follow at a later date.

Beyond Feel Sync, the CT-FS1 shares its core specifications and control layout with the CT-S1, which Casio introduced in 2021. It uses Casio's AiX Sound Source with 61 tones spanning acoustic and electric pianos, organs, strings, and synths, backed by 64-note polyphony and a two-tone layer function. Effects include reverb, chorus, delay, 10 master EQ settings, Volume Sync EQ and a surround mode. Two 13 cm x 6 cm bass-reflex speakers are driven by a 2.5W + 2.5W amplifier.

Both versions use a monochrome finish in which every key matches the cabinet, a departure from the conventional black-and-white keybed. The keyboard measures 930 x 258 x 83 mm and weighs 4.5 kg. It runs on the included AC adapter or six AA batteries, which Casio rates at about three hours of play. Rear connections include an audio input, a sustain pedal jack, and a headphone and line output, and the WU-BT10 also streams Bluetooth audio from a phone through the built-in speakers.

A music rest and strap lock are included in the box. The standard CT-S1 continues to retail at $259.99 without the WU-BT10 adapter, $140 less than the CT-FS1.