Casio Casiotone CT-S1 61-Key Touch-Sensitive Retro Keyboard - Portable

Our review of the Casio Casiotone CT-S1 finds it a rare blend of style and substance: a retro-looking, ultra-portable 61-key keyboard that suits beginners and seasoned players who want a flexible practice or performance instrument. The single biggest reason to buy is the combination of 61 full-size touch-sensitive keys with Casio's AiX Sound Source and surprisingly powerful stereo speakers, which together deliver expressive piano and synth tones in a package you can run on batteries and sling over your shoulder.

Key Features

• Retro style and portability: Vintage-inspired looks with a lightweight body, strap pins and optional battery power let players perform away from a stand or amp.
• Touch-responsive keys: Sixty-one full-size, touch-sensitive keys give dynamic control so both beginners and advanced players can shape tone and expression.
• AiX Sound Source: Studio-quality tones include a Stereo Grand Piano and 60 additional voices that cover classic electric pianos and synths for diverse playing styles.
• Simple front-panel controls: Intuitive buttons let you switch tones, record, and use the metronome and Surround feature without digging through menus.
• Speaker and surround system: Bass-reflex stereo speakers deliver clear acoustic presence while Surround mode widens the soundstage for practice and small performances.
• Smart connectivity: USB-MIDI is built in for DAW and recording use, and Bluetooth audio can be added with an optional adapter for wireless app connections.

Who It's For

The CT-S1 is ideal for learners who need a full-size keybed with touch sensitivity and for gigging musicians who want a compact, attractive backup keyboard with real onboard sounds. Its battery option and strap pins make it especially useful for busking, living-room performances, or musicians who move between rehearsal spaces.

Players who require weighted hammer-action keys or a large control surface with knobs and faders should look elsewhere, as this unit prioritizes portability and straightforward controls over advanced workstation features.

Pros & Cons

Pros

• Strong sound quality from the AiX engine and Stereo Grand Piano tone, praised by multiple owners.
• Very portable design with strap pins and optional battery operation for play anywhere convenience.
• Simple, discoverable controls and a FUNCTION guide let users access EQ and virtual venue effects without frustration.
• USB-MIDI connectivity makes recording and DAW integration straightforward with no drivers required.

Cons

• Not suitable for pianists who need fully weighted hammer action keys, since it uses touch-sensitive full-size keys instead.
• Bluetooth audio requires an optional adapter rather than being built in, adding potential extra cost.

Specifications

Keys	61 full-size touch-sensitive keys
Sound Source	AiX Sound Source with Stereo Grand Piano + 60 tones
Speakers	Bass-reflex stereo speakers with Surround mode
Power	AC adapter or 6 AA batteries (optional battery power)
Connectivity	USB-MIDI; Bluetooth audio available with optional adapter
Design	Retro-inspired lightweight body with strap pins

Our Verdict

The Casio Casiotone CT-S1 is a well-rounded portable keyboard that delivers great value for practice, travel, and small performances. Its combination of touch-sensitive full-size keys, convincing AiX tones and battery-powered portability makes it an excellent pick for learners and gigging players who want stylish looks and usable onboard features without a heavy or complex workstation.

Frequently Asked Questions

Does the CT-S1 run on batteries?
Yes, it can run on 6 AA batteries so you can play without an outlet when needed.

Can it connect to a computer for recording?
Yes, built-in USB-MIDI lets you connect to a DAW or MIDI host with no drivers required.

Is Bluetooth audio included?
Bluetooth audio is supported with an optional adapter rather than built in, allowing wireless app audio if you add the adapter.