Optical disc an additional tolerance to allow the use of less-than-perfect analog audio pre-filters to remove any higher frequencies. The first version of the standard allowed up to 75 minutes of music which required 650MB of storage. The DVD disc appeared after the CD-ROM had become widespread in society. The third generation optical disc was developed in 2000–2006 and was introduced as Blu-ray Disc. First movies on Blu-ray Discs were released in June 2006. Blu-ray eventually prevailed in a high definition optical disc format war over a competing format, the HD DVD. A standard Blu-ray disc can hold about 25 GB of
Understanding What We've Grown to Be Be". On April 9, 2013 the album was reissued in a deluxe physical edition, featuring their three most recent singles 'Hope', 'The King of Silence',' and 'Let These Words Last Forever' as well as a DVD of tour footage, interviews and live performance segments. "Understanding What We've Grown to Be" was recorded during two sessions, the first being from February 16 through March 10, 2011, and the second being from May 16 through June 23, 2011. On June 22, the first single <nowiki>"Mis//Understanding"</nowiki> surfaced through Equal Vision' official YouTube channel. A day later, the title track was also released for