All MIDI USB Protocol subtleties are absent. Thus, pressing the damper pedal of a piano YAMAHA ARIUS is interpreted as a multitude of notes mi3 ... This USB MIDI dongle works fine for sending notes to the PC, but that's it! Moreover, there is no optocoupler to isolate the signals from the keyboard and PC. I thought the problem was there, but having added the missing components did not solve my problem. Do not purchase this product! And if it is too late, do a Google search with these keywords for more information: cheap-usb-midi-cable-some-self-assembly-may-be-required Sustain pedal plays e3
