Needed for my music machine (Win7 64bit with Steinberg Cubase) more Midi ports. Was skeptical about the price. Launched request from dealer to 64bit functionality. His statement: would play. Had then ordered 4 pcs. Hardware also played. Problem was that all 4 MIDI ports with identical names were original driver in the integration and Cubase had to be reconfigured each time at startup. Have found who numbers the hardware when integrating a driver. Well, after that was quiet and everything was nice. Here the driver is to be sought after, if you want to use several USB to Midi: EmmP_PCDrv_US_1_01_05.exe (emu)