Bryn Terfel / Elin Manahan Thomas / Cywair chorus master: Islwyn Evans, CF1 chorus master: Eilir Owen Griffiths and Côr Caerdydd chorus master: Gwawr Owen / Côr Heol y March chorus master: Eleri Roberts and Côr y Cwm chorus master: Elin Llywelyn-Williams / `Sinfonia Cymru` leader: Benjamin Baker / Composed, conducted, orchestrated and produced by Karl Jenkins.