[Stk] RtMidi in Qt

[Ge Wang]

Hi,

It looks like the problem may be that RtMidi is constructing a STL
string with a unicode string, since you have -DUNICODE enabled.

     > g++ -c -O2 -O2 -frtti -fexceptions -Wall -DUNICODE
     > ...

error in RtMidi.cpp:

     > rtmidi.cpp:1799: error: no matching function for call to
     (some STL gunk output removed)
     > ::basic_string(WCHAR[32])'

I don't think string has an overloaded constructor for wide chars (by 
default), causing the compilation error.

Is unicode support crucial, or does Qt require it?  If not, try removing
-DUNICODE from your makefile, make clean, and compile again?

Best,
Ge!