Casio’s Role in Revolutionizing Keyboards

Electronic musical instruments have witnessed a plethora of groundbreaking developments. One brand that has continually remained at the forefront of this evolution is Casio. This article aims to chart Casio‘s remarkable journey from humble beginnings to the apex of digital keyboard innovation.

From Humble Beginnings

Casio is a household name in the world of electronics. Established in April 1946 by Tadao Kashio as Kashio Seisakujo, the company’s earliest innovative venture was the yubiwa pipe, a finger ring to hold cigarettes, highly valued in post-World War II Japan. Venturing into the world of calculators after witnessing the electric versions at a business show in Tokyo in 1949, Casio, under the expertise of Toshio Kashio, developed Japan’s first electro-mechanical calculator by 1954. This innovative calculator was distinct, using a 10-key number pad in contrast to the prevalent “full keypad”, and also introduced the concept of a single display window.

Formed officially as Casio Computer Co., Ltd. in June 1957, the company soon launched the Model 14-A, the world’s first all-electric compact calculator. However, by the 1980s, Casio had diversified and was garnering attention for its affordable home electronic musical keyboards. While the company played an instrumental role in pioneering quartz watches, both digital and analog, it was particularly known for introducing watches that showcased multiple time zones, recorded atmospheric conditions, and synchronized with global radio towers and GPS for precise timekeeping.

Today, while Casio boasts a diverse product range that includes digital cameras, mobile phones, and PDAs, it remains synonymous with innovative and durable electronic products. It’s particularly known for its G-Shock range of shock-resistant watches, electronic musical instruments, and state-of-the-art scientific calculators. Over the years, Casio has consistently exhibited an unwavering commitment to innovation, even tailoring products to cater to specific local needs, like the “Prayer Compass” watch series designed for Muslims.

The Casiotone 201 (1981): A Leap Forward

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The CT-201 wasn’t just another electronic musical instrument; it was Casio’s maiden voyage into this domain. The Casiotone 201 was designed to eliminate two significant barriers in music: cost and complexity. This compact and lightweight electronic keyboard had a built-in speaker and could emulate the sounds of 29 different instruments. Positioned neither as an electric organ nor a synthesizer, it was described as a “third type of instrument.” This innovation catered perfectly to society’s thirst for rich musical experiences, making music more accessible and spawning an entirely new way of engaging with melodies.

Casio VL-1 (1981): Merging Technology with Music

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The VL-1 wasn’t just a unique instrument due to its combination of calculator and synthesizer. Its sound generation, predominantly made up of filtered square waves with varied pulse widths, was a significant departure from traditional instrument sounds. The voices, including piano, violin, and flute, were abstract versions of the real instruments, lending a unique character. The “fantasy” voice and the programmable synthesizer added depth. The small LCD, besides serving the calculator function, showed notes played. With its changeable tone and balance, tempo settings, and the real-time monophonic music sequencer, the VL-1 was truly revolutionary.

The CZ-101 (1984): A Synthesis Revolution

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With the CZ-101, Casio introduced the world to the “PD sound source.” PD, short for Phase Distortion, was a technique that tweaked the phase angles of waveforms, generating rich overtones. This made sound production a breeze, dismantling barriers that had kept synthesizers exclusive to a specialized niche. By broadening the accessibility of synthesizers, the CZ-101 brought a wave of new users into the fold.

Sampling Keyboard SK-1 (1986): The Global Phenomenon

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The SK-1 wasn’t just a keyboard; it was a revolution in the world of sampling. Before the SK-1, sampling was exclusive and pricey. With this keyboard, sounds from the environment, like voices or animal noises, could be seamlessly integrated into music. This global favorite made Casio a household name, with over 1 million units flying off the shelves.


Casio’s contributions to the world of digital keyboards have been monumental. From introducing unique synthesis methods to democratizing the world of sampling, Casio’s legacy will continue to inspire and shape the future of music.

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