Michael, though not being an expert on this topic I don't think you'll get it working that easy with ordinary USB-MIDI converters. The reason is that with two connected USB devices one has to act as a host (controlling the communication), the other as a guest (performing the tasks). Host is usually the PC/MAC and guest is e.g. the MIDI converter or the keyboard in your case. Connecting keyboard with an ordinary MIDI converter will effectively connect two guests with no host to control the communication, so what you need is a device that acts as a host, e.g. http://www.kentonuk.com/products/items/utilities/usb-host.shtml. I'm not saying this particular one will work but in general, these are more costly devices compared to USB guest converters and more intelligent (which is a feature you probably won't use in the setup described), this particular one seems to be dumb enough so it doesn't cost you a fortune, though. Hope this helps, freddy