CME U4MIDI WC User Manual page 5

flash rapidly.

Presets button
The U4MIDI WC comes with 4 user presets. Each time the button is
-
pressed in the power on state, the interface will switch to the next
preset in a cyclic order. All LEDs flash the same number of times
corresponding to the preset number to indicate the currently selected
preset. For example, if switched to Preset 2, the LED flashes twice.
The free UxMIDI Tools software can also be used to toggle the button
-
to send an "All Notes Off" message to all outputs for 16 MIDI
channels, eliminating unintentional hanging notes from external
devices. Once this function has been set up, you can quickly click the
button while the power is on.
When the power is on, press and hold the button for more than 5
-
seconds and then release it, and the U4MIDI WC will be reset to its
factory default state.

USB-C port
The U4MIDI WC has a USB-C socket for connecting to a computer to
transit MIDI data or connecting to a standard USB power supply (e.g.
charger, power bank, computer USB socket, etc.) with a voltage of 5 volts
for standalone use.
When used with a computer, directly connect the interface to the USB
-
port of the computer with the matching USB cable or through a USB
hub to start using the interface. It is designed for plug and play, no
driver is required. The USB port of the computer can power the
U4MIDI WC. After installing the WIDI Core expansion module, the
interface adds an additional 1-in-1-out USB virtual MIDI port based on
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