Old thread I know, but I 2nd the use of Anytune Pro (iOS only for now unfortunately but plans for Android in the works). My experience is, Conductor works great with just midi tracks but is hit/miss when using RealTracks. The Anytune Pro app works very well with RealTracks as bobc indicated, so I use it when Conductor has issues. The beauty of Conductor is I can change the tune literally on the fly (keys, tempo, changes, styles, etc.) but it has some challenges with RealTracks. For live performance, certainty is everything, so I'm forced to use an alternative like Anytune Pro in those situations.