Oh, I forgot to write, that the UMG3 midi interface by cakewalk already worked for multiple clients on Windows 7. But they delivered a proprietary driver and did not rely on the standard multi media api of windows. But it worked with no issues without the fact that H9 control does not like it. I changed the OS from 7 to 10 after I got the two H9s. But under the given assumption that you work on the MM api it makes sense.
But anyway I like your stuff.
