before this there were mostly Synths & single KB;s to stack but Here I am playing on stage 1983 with my band with one of the first arrangers a KORG SAS 20 Intelligent Arranger KB & on Top a Yamaha CS-01 Mini Synth for LH bass...
Wow times have changed!
http://www.keyboardmuseum.com/ar/k/korg/s/sas20.htmlhttp://tinyurl.com/6eawrnxhttp://www.vintagesynth.com/yamaha/cs1.php