If you are a power user of Yamaha and Steinberg you've gotten used to the integration of your Yamaha hardware Synth and your Steinberg Cubase software via the Editor VST. However, the initial release of Cubase Series 8 seems to have broken the function (Ed.: fixed with version 8.0.10 3/12/2015 and later) - you can still take advantage of the features and benefits provided by the VSTi routing using this advanced External Instrument setup.
This article can help you help you set up your MX as an external instrument in Cubase Pro - allowing you to use Steinberg's Virtual Studio Technology signal routing to RENDER MIDI as AUDIO. Instructions are applicable whether you are using an instrument from the oiginal MX series, the MX49/61 BK/BU/WH or MX88.