User's Guide Part 3

113

DRAF

High Performance Options – Jitter Correction

Jitter occurs when a CD-ROM drive cannot find a

specific frame, or sector, while it is reading. This

results in pops or breaks in the audio. Jitter

correction is a way of improving audio through

overlapping or multiple reading of the same frames

to help ensure a high-quality conversion.

On an audio CD, the tracks are written and read in

spirals, much like on vinyl. Unlike vinyl, these

spirals are not one single, continuous groove – they

are individual frames (sectors) in sequential order.

Each successive frame is marked with a time-code

to maintain a sort of ‘continuous groove’. They are

read in blocks.

For example, a drive set to read blocks of 15 frames from the CD above would read them

in the order below:

Since each frame is read only once, a lagging processor may lose data and jitter errors

may occur. Jitter correction adds overlapping frames within each read block, ensuring a

continuous data stream. For example, a correction of 5 frames would tell the drive to

read in the following order:

Overlapping frames help maintain the ‘continuous groove’ as the CD drive and computer

exchange audio data. Jitter correction can be activated or deactivated in the Ripper

Utility by setting High Performance Options:

Jitter Correction… tells the drive when to use correction:

• None. No jitter correction.

• Always. Always use jitter correction

• On Error. Only use jitter correction when errors

occur.

Jitter Frames… sets the number of overlapping frames.

Compatible Mode Options – Jitter Correction

Jitter/Error Correction activates/deactivates jitter correction or sets specific modes.

None… disables jitter correction.

Always… uses settings in High Performance Options –

Jitter Correction fields.

Double Precision... is optimized for use in converting old

and used CDs.

Paranoid… is optimized for use in converting scratched

and unreadable CDs.