Le jeudi 24 décembre 2015, 11:48:07 Bob van der Poel a écrit : > I believe that the MIDI spec > > http://www.midi.org/techspecs/electrispec.php > > says that you must have a opto-isolator. Devices without one are probably > not compliment ... don't know about direct usb connections. > MIDI uses an unipolar signaling which is very sensitive to electromagnetic noises, in particular those ground loop generates. That's why MIDI standard requires an opto-coupler. USB uses a differential signaling and can works without any galvanic isolation. -- Yves Guillemot _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
