Do you want to record from an electronic musical instrument keyboard? Do you want to run cues from a computer keyboard?

 

I hope you mean the former, and not the latter. Just about any moderately good minidisc deck will have RCA jacks in the back for both line input and line output, and some have microphone input jacks as well. Some more recent portable minidisc players don't have such standard inputs, so they can't be used for making virtually lossless illegal copies of CDs, but there are other ones out there that do have such inputs. If your keyboard has mic level outputs, rather than line outputs, you may need to run the signal through a mixer or a direct box before connecting it to the recorder.

 

If it is the latter, I can't help you. That sort of system requires a complex, usually non-standard communication protocol.

 

Something like the following should serve your needs, if it is the former you spoke of...

 

 

or

 

 

I hope that helps!