My Novation Launchpad only lights up with duplex in one of my USB ports. The buttons function normally, just, no lights. This shouldn’t be a power issue, as all devices I have ever used work fine in all my ports, including my MPK61. It works fine in ableton in all ports. WTF?
I realized both in and out have to be set to the launchpad, don’t know how it was working with it only set as the in before… oh well. disregard this post 