The most ambitious and successful of their early albums, Horslips' most progressive creation, and maybe the most successful rock concept album ever done, The Tain is rock put into the service of epic storytelling (or is it the other way around?). Based on the Irish saga Tain Bo Cuailgne (The Cattle Raid of Cooley), part of the Ulster Cycle of heroic tales, it tells of war and carnage brought about over the possession of a white bull, inspired by events estimated to have taken place around 500 B.C. This is a long way from Chuck Berry or Little Richard, but it does rock hard, and unlike a lot of progressive rock, The Tain displays considerable tension and momentum. Some listeners will detect modest similarities to Jethro Tull's work (especially on "Charolais"), but there's a lot less meandering here than there is on Tull albums, the flute playing is better, and the material moves forward in a fairly nimble fashion. It would be easy to praise John Fean's guitar, but Jim Lockhart's flute is just as impressive, Charles O'Connor's violin playing is gorgeous, and Eamonn Carr's drumming is dazzling. And the vocals are quite good too, sweet but earthy and honest, and not self-consciously profound – these boys had ambition, but they weren't full of themselves or too given to pretensions.
One of the first QuadraDisc LPs that RCA ever released, Dimension III holds the unique distinction of being a “single inventory” title, meaning the four-channel quadraphonic mix was the only mix of the album done, as the label wanted to tout the backwards compatibility of quadraphonic records with existing stereo systems. In the wake of Castor’s acrimonious departure from RCA in late 1973, the label took Dimension III out of print and it has remained that way – until now. This new SACD edition presents the original quadraphonic mix in all its glory, along with a stereo fold-down of the quad mix – more than forty years later the universal compatibility of the QuadraDisc fulfilled in a way its inventors could never have imagined.