C2 (pronounced "eck die") is a Welsh language music and youth strand on BBC Radio Cymru, broadcast on weeknights between 7pm and 10pm (6:30pm on Fridays) from BBC Cymru's studios in Cardiff and Bangor.
C2 broadcasts a mix of popular music in both Welsh and English, tending towards rock and pop rock with a distinctive focus on exclusive sessions and interviews with artists alongside regular features on the Welsh music scene, showbiz news, online reviews and sport. C2 also broadcasts an annual nationwide Battle of the Bands competition, supported by Menter Iaith Cymru, with regional rounds broadcast leading up to the final. The competition is open to any Welsh-medium popular music performers. News bulletins are broadcast hourly between 7pm and 10pm.
The 9pm slot on Friday nights is given over to features & series and is repeated on Sunday afternoons from 2-3pm.