Harvard University’s electroacoustic music composition program had very stringent acoustical requirements that called for vibration control, reduced sound transmission, and appropriate surface treatment. The renovation included replacement of light fixtures with silent alternatives and a virtually noiseless replacement heating and cooling system mounted on vibration isolators atop a new structural system. This work took place with minimum impact to the historic building. Operable double-glazed windows to seal out external noise were installed on the interior so historic windows remained intact. Historic moldings were removed and reinstalled.