Can I connect an external hard drive to the USB MIDI port on Quartet? Chris April 21, 2021 22:45 Updated No, the USB MIDI port on the back of the Quartet is USB MIDI and only works for Core MIDI devices. Related articles How to insert outboard gear with Quartet I want Maestro to be opened automatically when I connect my Quartet. What should I do? Updating Quartet Firmware via Maestro for iPad, iPhone, iPod Touch My Youtube video won’t play on my Windows computer and Apogee interface, how can I resolve this? Is Quartet USB Core Audio Class Compliant? Comments 0 comments Article is closed for comments.