Notation software...?

[Nowa]

Are there any existing computer software equal to Guitar Pro...?
I'm looking for a software in which you can write scores for guitar and piano. But also, it should have a function, that allows you to export the score as eg. a .wav file... That would be convenient when you make music with a Magix program...

Does anyone of you know a program like that...??

And what program does producers like N.E.R.D or Timberland use, when they make music...?

[hitsware]

Something like this ?
http://www.musitek.com/
It is easy to convert midi to wav
Just play the midi and record.....