Jitter Correction

When digital audio is read from a CDROM drive, most drives are not capable of positioning the laser at the precise beginning of the data that you are trying to read. This is because there is no extra information in an audio sector to indicate where the sector starts (as there is in a data sector). Because of this positioning error, the drive will either miss a certain number of bytes at the beginning of a sector or read duplicate bytes from the end of the previous sector. The jitter correction algorithm in this software compensates for these positioning errors through the use of overlapped I/Os and a sector comparison scheme.

The only drives that absolutely require jitter correction (to insure a perfect copy) are those made by Toshiba. All other drives supported by this software only require that the audio data be read fast enough to keep the drive's internal buffer from overflowing as it streams data off of the disc. If you are using a very fast drive such as the Plextor 6Plex, then your system might not be able to keep up with the fast transfer rate and a buffer overflow will occur. In these rare cases, you will need to enable jitter correction to compensate for this heavy load. Some drives, such as the Plextor 8Plex and 12Plex have automatic jittter correction built into the firmware.

Note: It is not harmful to explicitly enable jitter correction for any CDROM drive. The worst that will happen is that the audio will be read slower due to the overlapped I/Os.