Yes! It was my first gig with a 49 keys only keyboard !
When you are accomodated to play on 76 or 88 keys, it's a strange compression feeling, but after some minutes, setting the right Split note and the octaves, it was OK
I just bought this small Roland A500s usb keyboard.
It is very cool ! Lightweight but robust. Small enought to go on a standard bag. It is USB powered, So only one USB cable to the computer, and we are ready to play.
You can plug Sustain and Volume pedal.
On the same USB cable you have a MIDI OUT port, who can be used like a MIDI interface.
So I plugged my computer to the Ketron SD2 with a midi cable coming out of the keyboard.
The Roland USB/MIDI technology is not the same as other companies. They developped their own USB protocol for fast and stable MIDI transfert to the computer.
I was very pleased about the overall strong feeling when playing.
I was also able to assign 2 buttons and 1 knob to control the vArranger.
I assigned the Master volume to the knob, Variation Up and FILL IN to the 2 buttons.
For the others things, I was using the touch screen.
Quite hard in the first tries, but OK with some experience