The Roland UM-4 is a USB MIDI interface that uses the Universal Serial Bus to connect up to four MIDI ports to a computer. It features four independent MIDI IN/OUT ports, four MIDI indicators, and requires no separate power supply as it draws power from the computer via the USB cable. The unit is designed for high-speed data transmission and allows for hot-swapping of devices without turning off the computer power.
| MIDI Ports | Four MIDI ports (each with MIDI IN/OUT) |
|---|---|
| MIDI Indicators | Four MIDI Indicators |
| Channels | 64 Channel |
| Power Supply | Not Required |
| Maximum Units | Four |
No, the power is supplied from the computer itself via the USB cable, so a separate power supply is not required.
Yes, peripheral devices can be connected or disconnected without turning off the power, and the computer will automatically detect the device.
A maximum of four units can be used simultaneously if a USB hub is used.