Aimed primarily at dance musicians, the CS1x features analogue synthesizer-style rotary controllers and monotimbral synth voices.

The CS1x uses the Yamaha Sample and Synthesis technology, as well as General MIDI and XG voices from the MU-50 module.

[1] The CS1x employs various arpeggiator presets and effects such as reverb, chorus (including flanging and celeste) and "variation" (a combination of reverbs, delays, modulation effects and equalisation).

The CS1x, CS2x and AN1x synthesizers all have a small lip on the right hand end of the front panel to accommodate a QY or SU sized module.

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