Yamaha DTXpress/DTXplorer/DTXtreme

Softwares which convert wav or mp3 files to midi files don't really exist.(I
have found some freewares but the results are very bad.) But it is not a
problem since it is not very usefull.  Popular songs can be found easily as
midi files. I don't know very much about midi file sites but there are very
numerous and if you make a search with the tittle of the song you want
associated with "midi", I am sure you will find.
Vivien