Universal Audio Volt 476 Hardware Manual page 17

Host indicator
doesn't light
Crackling audio,
dropouts,
glitches
(PC) ASIO driver
not available in
DAW
Power Volt off and back on.
•
Try a different USB port or USB hub.
•
Try a different USB cable.
•
Increase the buffer size setting in the software on
your computer. When recording, you can use direct
monitoring to record without latency at higher buffer
sizes.
Install the Volt hardware driver with the UA Connect
app.