In 1984 I was using my guitar, with a mdi connection, to my Yamaha keyboard. I was making a transition for guitar player to keyboard player. I did not have keyboard chops, so my guitar controlled the keyboard. Guitar was set to the same midi channel as the left hand. Vocal, guitar, and keyboard – full sound.

Set-back: My guitar could not solo, it would affect the chord message. Sense then guitar and midi have come a long way

The SD90 looks like a dream, great sound, but I want one instrument, one piece, no midi controllers, an instrument that is complete in its self. One peace is enough for me to think about.

Opinion, John C.