How do I write more than 74 minutes of audio or 650MB of data?
CD-R’s have a pre-formed spiral track, and the sector addresses are hard-coded into CD-R media, so there’s no flexibility. Every disc holds a predetermined amount of data. Most discs rated at 74 minutes hold slightly more than that. How much more depends on the brand of media, batch of media, and perhaps even on the recorder used (see section (7-6) for more details on how much a CD-R can hold). In some situations you can exceed the stated capacity of the disc; see section (3-8-3) below. Since CDs are written in a spiral, the amount of data you can get on a disc is affected by how tightly spaced the “groove” is. A standard Red Book audio CD or Yellow Book CD-ROM is designed to allow at most 74 minutes of data. By using a tighter track pitch on the spiral “groove” on the glass master, manufacturers can get more data onto the disc. In theory this could make it harder for some CD readers to use the discs. See section (3-8-1) for notes on 80-minute discs. The easiest way to get more data on
CD-R’s have a pre-formed spiral track, and the sector addresses are hard-coded into CD-R media, so there’s no flexibility. Every disc holds a predetermined amount of data. Most discs hold slightly more than 74 minutes. How much more depends on the brand of media, batch of media, and perhaps even on the recorder used (see section (7-6) for more details on how much a CD-R can hold). In some situations you can exceed the stated capacity of the disc; see section (3-8-3) below. Since CDs are written in a spiral, the amount of data you can get on a disc is affected by how tightly spaced the “groove” is. A standard Red Book audio CD or Yellow Book CD-ROM is designed to allow at most 74 minutes of data. By using a tighter track pitch on the spiral “groove” on the glass master, manufacturers can get more data onto the disc. In theory this could make it harder for some CD readers to use the discs. There *are* 80-minute CD-R blanks, but they’re more expensive, and may not work on all systems. Som
