If your computer fails to recognize the Yamaha PSR-S550, use these targeted troubleshooting steps to resolve the issue. Error: "Device Not Recognized" or Unknown Device
The Yamaha USB-MIDI Driver is designed to facilitate the bidirectional transfer of MIDI data. It enables several key features:
Change the view to "Large Icons" and look for the icon.

If your computer fails to recognize the Yamaha PSR-S550, use these targeted troubleshooting steps to resolve the issue. Error: "Device Not Recognized" or Unknown Device
The Yamaha USB-MIDI Driver is designed to facilitate the bidirectional transfer of MIDI data. It enables several key features:
Change the view to "Large Icons" and look for the icon.