[Jon.Porter]

USB hub worked for me. It was one of the first solutions I read when searching but I chose to try 10 other things first because that sounded silly to me. But it worked when connected thru a USB hub.

[Jon.Porter]

My Alesis Nitro Pro XL would send midi data via USB connection to my PC for like 10 seconds, then stop. I used Pocket MIDI to monitor the signal. The device was seen by my PC and all VST instruments, but this 10 second thing would happen, if I was lucky enough to even get it to send at all. Tried different cables, different ports, power saver settings, settings on the Nitro module. My final solution was a USB hub. I bought a USB 3.0 hub with an optional external power adapter. I connected the hub to a 3.0 port on my PC, and the Nitro Pro XL is now sending a stable signal to my PC. I did some testing, and found that I don’t need the external power source connected to the hub for it to work. Hope this helps someone.

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