Casio CZ-230S (1986)
A digital synthesizer using phase distortion synthesis, released as part of Casio's final wave of CZ-series instruments.
Overview
The Casio CZ-230S is a digital synthesizer released in 1986, one of the last models in the CZ family before production ended. Designed for musicians interested in creating and modifying their own sounds, it stands out as a less common variant with built-in drum patterns and a single internal speaker for home use. It features 49 mini-sized synth-action keys and runs on either AC power or six D-cell batteries, making it portable for its time. Though positioned as an entry-level instrument, it offers sound editing capabilities and integrates phase distortion synthesis—a hallmark of the CZ series.
Specifications
| Number of Keys | 49 |
| Key Weight | Synth |
| Key Size | Mini |
| Touch Sensitive | no |
| Aftertouch | no |
| Number of Voices | 100 |
| User Memory | 20 |
| Polyphony | 8 |
| Sound Generation | Phase Distortion |
| Oscillators | 2 DCOs |
| Sounds Editable | yes |
| Accompaniments | yes |
| Recorder/Sequencer | no |
| MIDI | yes |
| USB | no |
| Tablet Connectivity | no |
| AC Power | yes |
| Batteries | yes |
| Battery Type | Six D size dry cells |
| Speakers | yes |
| Audio Out | yes |
| Audio In | no |
| Sustain Pedal | no |
| Soft Pedal | no |
| Expression Pedal | no |
| Weight | 11.3kg |
Design
The CZ-230S uses phase distortion synthesis, a technology that defined the Casio CZ series, allowing for dynamic waveform shaping. It features two DCOs per voice, with modulation possible between oscillators. The unit includes a single built-in speaker—denoted by the "S" in its model name—and is designed for direct playability without external amplification. Its construction supports sound editing, though it is not considered fully programmable in the traditional sense.
Context
The CZ-230S was released in 1986 as part of the final group of models in the CZ series, which spanned from 1984 to 1986. It shares waveforms with earlier models like the CZ-101 and is grouped with variants such as the CZ-2000S and CZ-2600S that added drum accompaniments and built-in speakers. Marketed toward entry-level users and home musicians, it was likely region-specific and not widely exported,
Market
When disconnected from power for several days without batteries, the CZ-230S loses its RAM contents, including user-programmed sounds. Some users have reported issues with power adapters due to incorrect polarity, emphasizing the need for caution when sourcing replacements.
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