so, after all it seems it was your midiman the culprit? who would tell? Before you send it to the trash bin, please try with another computer at the least: it might be the USB host controller at the stake... now, are you possibly using a usb-hub of some sort? it might be not powering the midiman properly or somehow the new and cheap interface needs lower power requirements, idk... have you tried to plug it in in some other usb-port?
on the damp pedal trouble: how is that even supposed to work? i guess you plug it in directly to the midi keyboard and that's it! the corresponding midi events should appear through midi to the computer and possibly recorded into the daw (qtractor or else); it seems (very) strange that you need to feedback the pedal output (which is probably just an electric switch that only the keyboard understands as such) onto the keyboard again--question is, is it really midi? if not, probably that's the whole trouble and misunderstanding you're having ever since the start? idk...
so, after all it seems it was your midiman the culprit? who would tell? Before you send it to the trash bin, please try with another computer at the least: it might be the USB host controller at the stake... now, are you possibly using a usb-hub of some sort? it might be not powering the midiman properly or somehow the new and cheap interface needs lower power requirements, idk... have you tried to plug it in in some other usb-port?
on the damp pedal trouble: how is that even supposed to work? i guess you plug it in directly to the midi keyboard and that's it! the corresponding midi events should appear through midi to the computer and possibly recorded into the daw (qtractor or else); it seems (very) strange that you need to feedback the pedal output (which is probably just an electric switch that only the keyboard understands as such) onto the keyboard again--question is, is it really midi? if not, probably that's the whole trouble and misunderstanding you're having ever since the start? idk...
please