Dt25 Midi Issue in DT50 / DT25 Posted April 23, 2014 Not really... It's the interface. The cheaper ones use the default Windows or Mac MIDI drivers, and they simply can't handle the streaming of large sysex files very well. I've heard the same thing from other companies who do firmware updates via MIDI. They all recommend using an interface with robust drivers that can handle the sysex streaming. My cheapo generic has no trouble doing sysex dumps to/from my td12 and my access virus, yet won't work with dt25. There's nothing wrong with the interface that I can see, if you can recommend some kind of midi compliance test software I'd be glad to give it a whirl.