The music and song in this show was consciously selected to reflect the history and geography ot the Upper Shannon basin region and was directed by renowned bouzouki player/accompanist/arranger Niall O Callanain.. The majority of the artists in Sionainn come from counties in this area - Westmeath, Roscommon, Longford, Leitrim and Cavan - and include well-known names such as John Wynne (flute), James Donohoe (accordion) and Irene Guckian (fiddle). Sionainn, meaning Shannon, gives the group its name and the show its theme, entitled Crossing the Shannon from the lively reel of the same name. Together with dance and stories the production showcases the strong traditional culture of the area.

Crossing the Shannon is produced by Michael Gunn and James Donohoe.