There is nothing like tracking live vocal harmonies. Having multiple singers performing together can create a magical vibe. While not quite as gratifying as recording multiple singers, one singer overdubbing additional harmony parts still provides the advantage of natural-sounding pitch and timing variations.  Sometimes, however, we are sitting in front of our DAW with either a single lead vocal track, or some vocal doubles, and decide after the fact that harmony parts will enhance the vocal arrangement. 

Most DAWs have some pitch-altering functionality. But when creating harmonies from doubled unison vocals, the highest quality transposition algorithms are necessary for the best quality harmonies possible. 

Although most would consider this situation a deficit (not having live-tracked harmony parts), it can also be considered an advantage. Creating vocal harmonies in this way provides the opportunity to experiment with different harmonizations and intervals. And it allows for the possibility of the underlying chords to be altered after the vocals are tracked (providing of course, the lead vocal still fits the revised chord progression).

RePitch from Synchro Arts brings best-in-class, premium-quality pitch transposition algorithms to the party. Generating harmonies is a pleasure, given the natural sounding quality of the algorithms. Additionally, the formant shifting function enhances the possibility of differentiating the timbre of the generated harmonies. Formant shifting lends a slightly different quality to each new vocal part. 

In this short video, I take a lead vocal with two doubles and use Repitch to create a vocal arrangement that includes intervals that fit the underlying chords. Some phrases still work best with unison doubles, while others bloom with additional harmonies. Formant shifting is used for some final tweaks, and a new vocal arrangement is born!