Can I use M4U XL / M8U XL without a computer?
No. Both M4U XL and
M8U XL are USB MIDI interfaces
that require to be connected to a computer to operate. In order to send MIDI
signals through from an input to an output and/or to merge several MIDI signals,
a software application is required. Many Audio-/MIDI sequencers and DAW applications
provide this functionality.