MIDI Input selector grayed-out (Windows 7 64-bit)
In the I/O preferences, the selection box for "MIDI Input:" is grayed out, even though I have MIDI devices connected to my PC. PortAudio is selected for audio handling. This bug affects MuseScore 2.0.0 and 2.0.1 under Windows 7 64-bit. Running MuseScore 2.0.0 in Kubuntu 14.04 on the same hardware, my USB MIDI input device (Korg nanoKEY2) works just fine. Running pmdefaults in Windows shows the following available MIDI input drivers:
AeroMIDI Driver [MMSystem]
VMidi 1 [MMSystem]
VMidi 2 [MMSystem]
VMidi 3 [MMSystem]
VMidi 4 [MMSystem]
As expected, MuseScore isn't responding to any incoming MIDI data on any port.