He toured the country for a number of years with his group Non-Intentional Lifeform on Dutch label Roadrunner Records.

In 1999 he formed the musical group Clann Zú featuring various musicians from Melbourne's classical, punk and electronic scenes.

Clann Zú released two albums Rua and Black Coats and Bandages on Canadian political label G7 Welcoming Committee.

de Barra returned to Ireland in 2002, continuing to perform with Clann Zú on their final tour throughout 2004 in Canada and Australia.

In 2005 he released a debut solo album, Song of a Thousand Birds followed by "A Fire to Scare the Sun" in 2008, and "Fragments Footprints & the Forgotten" in 2011, all on Swedish Label, Black Star Foundation.