i am using mm16 and have recorded a song using the vita but without any midi effect..i.e e-piano..
when i play the track i get just a strait piano sound but when i mix down and open the song in real player or media player the piano is not there.....pls help
It sounds to me like you may have answered your own question.
It sounds like you haven't actually assigned a virtual instrument to the MIDI track. Why don't you assign an instrument, mark that track to play solo, and export it. Then, let us know if you hear anything.
It's worth a try, although I've never had a problem with the default piano.