Symptom Items to check
Unit won’t power up
  • Confirm if the unit is well connected to the USB port
  • Confirm if the USB port is working properly
Microphone is not working
  • If there is an ON/OFF switch on the microphone, make sure this is ON
  • Confirm if the microphone needs phantom power and that the phantom power on the uMi is On for the preset you’ve chosen.
  • If phantom power is needed, confirm if 12V is sufficient for the microphone to function correctly
Can’t hear microphone input
  • Confirm the correct audio interface is selected in the system configuration settings
  • Confirm if the microphone is working
  • Confirm the preamp Gain is turned up
Preset switch not working
  • Confirm the switch LED is not blinking
  • Confirm the preset content is written in the internal memory of the unit
Preamp controls have no effect on input signal
  • Confirm the microphone is working
  • Confirm the correct preset is chosen or controlled
  • Confirm there is a difference in settings between the presets
Noise is heard when no microphone is connected
  • Lower the Gain settings; mic preamps can generate noise when not used


  1. Warranty
    technical Del Arte provides a warranty on all hardware products. To learn more, please visit or contact technical Support. This limited warranty gives you specific legal rights. You may also have other rights which vary by country and state.
  2. Maintenance
    uMi does not contain a fuse or any other user-replaceable parts. The unit is internally calibrated at the factory. No internal user adjustments are available.
  3. Repair service
    If you are having trouble with uMi, first check all system setups, connections, software installations, and the Troubleshooting chart. If that doesn’t help, contact technical Support. To learn more about repair service, please visit: