Blu-Ray discs are high definition video. You must have a Blu-Ray player to play Blu-Ray discs. DVDs are produced with broadcast-quality video and stereo sound. CDs are produced with stereo sound. ACB - CD Recordings $20.00 ACB - CD Recordings - Full Set $100.00 ACB - DVD Recordings $30.00 ACB - DVD Recordings - Full Set $175.00 ACB- Blu-Ray High Definition Discs $40.00 ACB - Blu-Ray High Definition Discs - Full Set $250.00