Audio converter,Box 4x4 2i4o Midi Box In /4 Out Channels 4i/4o 64 Midi Channels Usb Midi 4 In /4 4i/4o 2i4o Midi Out 64 Midi 64di Dsfen Midi Mewmewcat Um4x4 Qisuo Usbdi
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4 MIDI inputs and 4 MIDI outputs (64 MIDI channels). High-speed connection to USB-equipped PC or computers. USB-powered, required no external power supply. Perfect MIDI timing. Merge function 2 ins-> 4 outs included.