Deterioration of speech and swallowing is a hallmark of Parkinson Disease (PD). There is emerging evidence that choral singing benefits people with PD across a range of modalities. Despite the increasing popularity of "Parkinson's choirs", rigorous study of these benefits is lacking. There is a large body of evidence that intense vocal training improves speech and communication for people with PD. However, the intense training places high demands on clinical and patient resources and, due to its individualized approach, lacks the potential psycho-social benefits of a group intervention.