Dublin bridge becomes a musical instrument for a performance at the Dublin Fringe Festival.

The harp shaped Samuel Beckett bridge is being transformed into a musical harp for the Dublin Fringe Festival. A celebration of light, opera and dance will take place on the bridge using specially composed music for a unique extravaganza.

Opera singers, more used to concert halls, are preparing to perform in this more unusual setting and are challenged with bringing their voices to the River Liffey.

For soprano Rachel Croash, the Dublin Fringe Festival is all about pushing the boundaries of what theatre is.

The bridge becomes a real harp for the night, its spurs lit by a laser as each note is played. All part of a special River Cantata.

This special river cantata a light and sound spectacular recreates the mythical harp of Dagda and is free for the whole city of Dublin to enjoy. The show has been two years in the making and has presented challenges for the organiser and the musical director Conor Hanratty.

We are taking over the Samuel Beckett Bridge and turning it into Ireland's largest musical instrument.

A new cantata for the city has been composed by Tom Lane. The performance will include drummers, dancers, singers, and people on boats in the river.

The event coincides with the opening of the Dublin Fringe Festival which runs throughout September.

An RTÉ News report broadcast on 6 September 2014. The reporter is Ray Kennedy.