Pitch correction of multiple vocal performances

A method of preparing a composite multi-vocal performance from vocal performances of first and second users captured at respective geographically separated first and second portable computing devices, the method comprising:

• at the second portable computing device and in response to a selection of a backing track by the second user, retrieving a vocal score temporally synchronizable with the backing track and with corresponding lyrics;
• via an audio transducer of the second portable computing device, audibly rendering a first user's pitch corrected vocal performance mixed with the backing track and presenting, in temporal correspondence with the audible rendering, via a display of the second portable computing device, corresponding portions of the lyrics, wherein the first user's vocal performance is captured and pitch corrected at the first portable computing device prior to the audibly rendering at the second portable computing device;
• capturing via a microphone interface of the second portable computing device the second user's vocal performance;
• pitch correcting the second user's vocal performance in accord with the vocal score for mixing into the composite multi-vocal performance;
• and
• pitch shifting either or both of the first and second users' pitch corrected vocal performances to harmony if notes sounded by the respective first or second user more closely approximate a harmony than a melody encoded by the vocal score and to thereby produce a harmonized vocal performance that is part of the composite multi-vocal performance.