The instrument
The DX27S is an identical version of the DX27, but with built-in speakers. It is an 8-voice polyphonic FM synthesiser with 4 operators and 8 algorithms available. The DX27 and DX27S are, in turn, 61-key versions of the Yamaha DX100 with no velocity sensitivity or aftertouch. All models include the same voices, 192 preset patches, 24 user-defined patches, and 96-voice storage for preset voices in any configuration.