MPI was honored to be invited to investigate reports of unusual activity at Olivet College in Olivet, Michigan. The investigation covered several areas of the campus, including the home of the school's music program, the Margaret Upton Conservatory of Music.

During the investigation, team members reported several instances of odd sounds in the various rooms of the Conservatory, including knocking sounds and what sounded very much like the handles of various doors 'rattling', as though someone was trying to open the door.

In this clip however, the investigators can be seen responding to what they could only describe as singing - specifically, the sound of someone singing scales, as though practicing singing or preparing to sing. The investigators immediately searched the area, attempting to locate an explanation for the mysterious sounds. None was found, and the sounds from that night remain unexplained.