YAMAHA CS1x 61-Key Control Synthesizer MIDI Keyboard Japan
Category Synthesizer. I verified that the sound changes across patterns 1 through 128 and that sound is produced from every key.
Yamaha CS1x 61-Key Synthesizer Tested Working w/AC Adapter from Japan
This is aYamaha CS1x synthesizer from Japan. AC adapter. Thedisplay is working.