How do I connect my Kawai piano to a Windows PC via Bluetooth MIDI?
Add the piano as a Bluetooth device in Windows Settings, then select it as the MIDI input in your MIDI application.
Enable Bluetooth on both your piano and your Windows PC. Put the piano in Bluetooth pairing mode. Go to Windows Settings > Bluetooth & devices and select Add device > Bluetooth. Select your piano from the list and complete the pairing process.
Open your preferred MIDI software (e.g. FL Studio, Ableton Live, or Reaper) and configure the MIDI input to use your piano's Bluetooth MIDI connection. Your piano will now communicate with Windows via Bluetooth MIDI.