DigiTech TRIO+ w/Keyboard Inputs 

I experimented to see if the DigiTech TRIO+ will accept digital keyboard inputs in addition to a guitar. It turns out that you can. The TRIO+ recorded the instruments exactly as sent by the keyboard, thus allowing for full orchestration of loops and songs along with teaching the band creator.
My keyboard has a 1/4" (6.35mm) output port, so I was able to connect to the TRIO+ using a standard guitar cable. Some keyboards may require an adapter.

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