This masters thesis encompasses a conceptual design for a floating concert hall in Sydney, Australia. It is situated in the waters of the famous Sydney Harbour. This unique position resulted in a special boat-like construction that can also set sail in the calm waters of the Harbour. It has also been enabled for the visitors to marvel at the rich Australian underwater life from the safety of the concert house insides. The guests can have an unobstructed view of the sea life through big windows surrounding the public areas. When anchored, and when the construction is submerged, the upmost surface of the construction can also be used as a public beach platform. Another specification of the project is its uncommon acoustical properties. This concept has been developed during a semester abroad at the University of Sydney, while studying at the department for Audio and Acoustics. A highly acoustically adaptable concert hall has been created, that can be adjusted to suit different music genres and sizes of the performing act. The inspiration for this acoustic concept has been drawn from the highly reverberant sugar pine forests.