EAC offset setting

[duckian]

I know EAC (ExactAudioCopy?) is very good for CD audio ripping. There's an option setting involving offset. I have a Creative 5233E and a Mitsumi 4802TE. The problem is I don't know how to get the offset value(s). Have anyone used this software (and happen to own one of the CDROM/CDRW above)? Thanks.