Your Style, Your Keys


Imagine your world filled with music. With the CT-S1, life is better in harmony. The simple, classic design is an easy complement to any room, and you can express yourself – anywhere and anytime – through music that reflects your emotion and brings joy and happiness. Easily transform your mood and style into your own personal sound.
Make music yours. Define yourself in sound.

Simply Focused on You


Bring life and light to your world with the CT-S1 – a minimalist design allowing you to focus solely on the music. Savor the pure essence of the keyboard’s musicality while developing your unique style. Functionality and design that is all about you, with a simple interface, and a color palette to suit every aesthetic and complement any décor. Create the perfect atmosphere with the CT-S1’s sleek look and uplifting sound.
Lighten your mood and brighten your day.


Sound That Truly Moves You


Bring vibrancy and emotion to your music with the CT-S1 – a keyboard like no other. Featuring AiX Sound Source, this innovative technology is designed to enable electronic instruments to produce the perfect tones and, combined with the integrated acoustic sound system, bring each note to life.
Recharge yourself with inspiration. Feel energized and encouraged to play more.


The Heart of a Champion


At the core of the CT-S1, the AiX Sound Source technology produces the true sounds and experiences of each instrument. Keyboardists can choose from 61 exquisitely crafted tones – including acoustic piano, electric piano and organ – so you’re guaranteed to find your favorites. Developed by expert engineers, Casio’s ADVANCED TONES allow you to experience the grandeur and flair of performance with modern ease.


Timeless Instruments Reborn


Footprints that pioneer your future. We’ve analyzed the sound and structure of vintage musical instruments used in hit songs from the past to the present, and brought them to life using our unique technology. Now you’re with the band. We’ve even included CASIO CLASSIC TONES, allowing old to become new again. We’ve captured the iconic sounds of our own rich lineage of keyboard and synthesizers, such as the Casiotone 201, to celebrate the 1980s debut of our electronic musical instruments.
Tune into the authentic sound of great musicians.


Sound That Brings the Room to Life


Experience dynamic sounds with the CT-S1’s newly developed built-in speaker system. The innovative Horizontal Bass Reflex technology and specially designed speakers provide clear, crisp notes with a powerful bass ‘punch’ in a chic and compact form. Take your musical immersion experience a step further and lose yourself in lush soundscapes amidst the full power of surround sound. Maintain superior sound quality at any decibel with the Volume-Sync EQ function that automatically adjusts the presence of bass and treble, even at low volumes.
The CT-S1 brings to life a world of sound to inspire you.


Keep It Simple.
Keep It Real


With the pure essence of musical instruments at its core, the essential keys, speakers and minimalist design add to the CT-S1’s simple functionality and operation, so you experience the best in playability and can concentrate on the music. Available in black, white or red, the keyboard’s speaker net, with its mixed color-texture fabric, spans the length of the console, adding to the wide soundscape experience. The sleek look provides the ideal minimal aesthetic, blending seamlessly with any interior setting, and allowing your life and your music to shine.
Bring together life, space, and sound in perfect harmony with the CT-S1.


Small in Size, Big in Inspiration


The CT-S1’s compact design ensures music is always by your side and easy to pick up and play anytime and anywhere. No preparation. No storage hassles. Music and innovation will always be at your fingertips. Its slim body will fit into any space, giving you the flexibility to match your playing style to your mood, with a form that fits into all kinds of tight spots. There are even pins for attaching your favorite strap, so you can experience the freedom of playing without a stand or desk. Whether you’re on your sofa surrounded by family, or relaxing in your bedroom, play whenever and wherever the mood strikes.


Connect with Your Music


The CT-S1 will never stop inspiring you. Bring your creative ideas to life. With the Wireless MIDI & Audio Adaptor WU-BT10*, you can pair your smartphone or tablet to your keyboard, and listen to or play along with your favorite songs through the CT-S1’s powerful speaker system. The Chordana Play app allows you to personalize your experiences. In Audio Mode, change the key and adjust the tempo. Using the ‘cancel melody’ or ‘cancel accompaniment’ buttons, turn your favorite music into a backing track and play along. Lesson Mode utilizes the MIDI capability to individualize your lessons and make learning fun. Other MIDI-enabled apps and external devices ensure there are no limitations on experimentation as you keep exploring new and fun ways to listen, adapt and create musical experiences.
Casiotone – not ‘just a keyboard’ – it’s your passport to enjoyment.

* sold separately




Feel at One with the Music

Casiotone Today – A Perfect Combination of Tradition and Technology

The next generation of Casiotone is the product of 40+ years of experience and 
technological development since we created our first electronic musical instrument. 
They’ve been given a modern overhaul while staying true to our philosophy 
of creating musical instruments accessible to anyone.

Express Yourself Like Never Before with Aix Sound Source

A Maximum Range of Musical Expression
True to Each Instrument’s Characteristics
[AiX Sound Source]


Casio’s state-of-the-art AiX Sound Source technology delivers stunning depth and realism through the complementary design of circuits, mechanical build, software, LSI processors and other components, providing extraordinary sound from a remarkably compact keyboard. Based on in-depth analyses of the audio characteristics of different instruments, AiX Sound Source can accurately reproduce acoustic instruments such as pianos and strings, electric instruments such as electric guitars and organs, and the electronic sounds of synthesizers. Tap into the unique expressiveness of each instrument and let your imagination inspire your performance.


Custom LSI Processor Vividly Capture Subtle Nuances


To achieve this refined expressiveness, Casio has developed proprietary large-scale integrated (LSI) processors, which are an integral part of the new Casiotone. The high-performance custom LSI chips are efficiently designed for optimal sound expression, and the unique waveform compression technology makes rich, high-definition sound a reality. For example, not only are the source instruments painstakingly recorded to reflect the nuance of the performance, but the LSI chips can also model the characteristics of amplifiers found in vintage instruments. This is possible through high-speed processing of the considerable data amassed from these original vintage instruments, enabling a superbly realistic response to musicians’ performances.

Distinctive Tones Expand the Possibilities of Expression

Rich, Exultant Tones, Created Through a Relentless Pursuit of Excellence


ADVANCED TONES – upper-echelon, refined Casio tones – are crafted using the best of Casio technology. Created by carefully modeling the acoustic and vintage instruments used in many classic songs, the tones come to life through AiX Sound Source. The result is a vivid recreation of the unique character and nuance of each instrument, with tones that vary dynamically in response to different subtleties in playing, enabling fresh new forms of expression.

* Only available on the CT-S1.


The Classic Casio Sounds from Musical History


AiX Sound Source brings back the beloved sounds of Casio’s classic electronic instruments with CASIO CLASSIC TONES, an exclusive selection of 12 tones for keyboardists. Featured instruments include the flagship 1980 Casiotone 201 (CT-201), the legendary Casio ultracompact VL-1, as well as the pro musicians’ synthesizers of choice, the CZ-101 and VZ-1. Recreate the tonal atmosphere of a past era with these classic sounds.

* Only available on the CT-S1.

Powerful Acoustics from a Compact, Refined Structure


Innovative Bass-Reflex System Packs a Punch in a Compact Space
[Horizontal Bass-Reflex System]


The Horizontal Bass-Reflex System is a space-saving technology designed to produce powerful bass, even from slim-bodied instruments. Rather than being directly mounted to the upper housing, the speaker is mounted on a component attached to the lower housing, forming a dedicated enclosure (speaker box). Its solid structure enables the Bass-Reflex System to produce compelling bass while controlling distortion and sympathetic vibrations, while enclosure parts and screws that could obstruct air flow or result in sympathetic vibration were also carefully eliminated. The ducts are rounded, meaning that sounds generate less noise as they travel through them, and the bottom surface of the case is slightly raised to prevent bass tones from being trapped. The elliptical design of the speakers achieves a slimmer body with a larger surface area, while the two-stage magnet generates a stronger magnetic force. Also, the edges of the cones (diaphragms) are made from fabric for a crisp, clean sound.


Intelligent Sound Adjustment Ensures Big Sound, Even at Low Volumes
[Volume-Sync EQ]


Volume-Sync EQ automatically corrects the balance between higher frequency sounds and the low register, which is subjectively quieter at low volumes. Optimizing the sound based on the characteristics of human hearing, the result is a pleasing tonal balance at any volume. Simply turn the volume knob and enjoy the same full-bodied sound.


Immerse Yourself in Surround Sound


The new Casiotone offers enhanced stereo sound that’s tailored to suit each tone at the touch of a button, and is surprisingly immersive for its compact size.

A Slimline Case Packed with Compact Innovations


Slim, Lightweight Body for Making Music Anytime, Anywhere


The Casiotone speaker units and structural design are adventurous and creative, achieving a slim and portable lightweight body. Designed to fit into the tightest spots, the keyboards are easy to carry, making transportation a breeze.



Simple Beauty and Intuitive Ease of Use


The Casiotone user interface is elegant and simple, and perfected suited for a musical instrument, making them easy for anyone to use. A reduced number of buttons and knobs creates a sleek appearance, and the intuitive layout lets you find the desired control instantly. The CT-S1 is designed to let you select the sound you want and get right into the music with a single button. The CT-S400 and LK-S450 feature a wider variety of functions and sounds but the LCD screen navigated with a dial makes them very easy to use. Frequently used sounds and settings can be freely assigned to buttons on the panel for instant access.



Smooth Touch and a Diverse Range of Instrument Sounds


The CT-S1, CT-S400 and CT-S450 feature highly durable key mechanisms with muted mechanical noise that are robust enough to resist shaking while being played. Enjoy the dependable, tactile touch of Casiotone to create a wide range of expressive sounds, from acoustic and electric pianos to organs, synthesizers and more.

Expand Your Horizons


Wireless Capability Expands Casiotone’s Potential
[Bluetooth® MIDI / Audio]Bluetooth


The WU-BT10 wireless MIDI & AUDIO adaptor (sold separately) supports both audio and MIDI without an external power source – simply plug it into your Casiotone to take advantage of new possibilities. Audio and MIDI data are transmitted together via USB using a proprietary protocol. The adaptor is the world’s first* to support both audio and MIDI data simultaneously, enabling users to play back their favorite tunes from smart devices through the Casiotone speakers, and transmit MIDI data between their Casiotone and smart devices or other electronic equipment. Although latency and signal dropout can be a problem when using Bluetooth, our system has been carefully optimized for low latency and high stability. Enjoy stress-free music playback or play your Casiotone through our app.

* Bluetooth® word mark and logo are registered trademarks of Bluetooth SIG, Inc. and any use of these marks by CASIO COMPUTER CO., LTD. is under license.

Input/Output Terminals


KeyboardNumber of Keys: 61
Touch Response: 3 sensitivity levels, off
Sound SourceAiX
Polyphony: 64
Layer2 (Upper1/2)
EffectsReverb: 24 (+Preset for each tone)
Chorus: Yes (Preset for each tone)
Delay: Yes (Preset for each tone)
DSP: Yes (Preset for each tone)
Master EQ: 10
Volume-Sync EQYes
SongsDemo Song: 1 + 10 (Piano demo)
My Set Up FunctionYes
Tone Memory FunctionYes
Transpose-12 to 0 to +12 Semitones
TuningA4 = 415.5 Hz to 440.0 Hz to 465.9 Hz
Octave Shift-3 to 0 to +3 Octaves
Scale SettingEqual temperament + 16 variations
MIDI RecorderYes
Songs: 1
Memory Capacity: 40,000 notes
General MIDIYes
Connection to Bluetooth®Bluetooth® MIDI/Audio: Yes (with optional adaptor)
Connection to AppSupported App: Chordana Play
TerminalsPHONES / OUTPUT: Stereo mini
PEDAL: Standard
AUDIO IN: Stereo mini
USB TO HOST: micro B
USB TO DEVICE: Yes *for WU-BT10 only
Strap PinYes
Speakers(13cm x 6cm) x 2
Horizontal Bass Reflex: Yes
Amplifiers2.5W + 2.5W
Power SupplyAC Adaptor: AD-E95100L (DC 9.5V)
Battery: AA-size alkaline batteries x 6 or AA-size rechargeable nickel metal hydride batteries* x 6
Battery Life: Approximately 3 hours continuous operationActual continuous operation time may be shorter due to battery type, performance type, and usage environment.

  • * Measured values while using eneloop batteries. eneloop is a trademark of Panasonic Corporation.
Power Consumption7.5 W
Included AccessoriesMusic stand, Strap lock
Optional Accessories (sold separately)Pedals (SP-3, SP-20), Headphones (CP-16), AC adaptor (AD-E95100L), Wireless MIDI & Audio Adaptor (WU-BT10), Special stand (CS-2X), Benches (CB-7, CB-30BK, CB-30BN), Carrying case (SC-650B)
EAN codeCT-S1WE: 4971850315087
CT-S1BK: 4971850315070
CT-S1RD: 4971850315094


Thank you for your express of interest, please fill in your details and our customer representatives will get in touch with you soon.