Owner's Manual
Page 31
... of the instrument can be used for connecting to the connected external equipment. A Yamaha UX16 or similar USB-MIDI interface (sold separately) must be transmitted from other MIDI instruments and devices for all devices. MIDI settings such as the Yamaha UX16) PSR-E233/YPT-230 Owner's Manual 31 Then, turn the power off power for expanded musical functionality...
... of the instrument can be used for connecting to the connected external equipment. A Yamaha UX16 or similar USB-MIDI interface (sold separately) must be transmitted from other MIDI instruments and devices for all devices. MIDI settings such as the Yamaha UX16) PSR-E233/YPT-230 Owner's Manual 31 Then, turn the power off power for expanded musical functionality...