Such clocks from that early time period include the Small World Dual Bell Ringers and the Small World Performing Musicians,[3] which all utilized simple square waves for sound synthesis.

In 2006, Rhythm introduced the Super Symphonic Sound (SSS), likely utilizing MIDI.

However, it has been said that copyright issues with JASRAC led to the discontinuation of SSS and DWS in 2009, while CTS remains in use.

[citation needed] Rhythm has also made large scale public automaton clocks.

Rhythm sells humidifiers, scent diffusers and waterproof phone and tablet cases in Japan only.