Hello
I have a LiteOn 52x/32x/52x CDRW drive, and I wanted to know the read/write offset of the drive, so I did a test with both EAC and Nero CD/DVD Speed.
And I got a value of 0 samples with both programs.
Am I just lucky, or is this some damn trick or something like that?

AFAIK, the LITE-ON LTR-52327S has a read offset of +6 and a write offset of -6.

Thats interesting, as I said I tried both programs, and I still get 0 (I used CDRW`s for the offset test cds but i dont think that changes anything)
Am I doing something wrong?
Oh BTW, I have the latest firmware installed, but I don`t think it changes anything.

Is there a way to check this other than EAC or Nero CD/DVD Speed????
I was thinking of copying an original audio cd, then extracting both the original and the copy, if it realy has an offset of 0, then they should be bit-by-bit identical right?

Oh as I remember the 52327S has two versions, do they have a different offset ?
(I have the older type)

Assuming, as Sebastian Mares said, that the read offset is +6 and the write offset is -6, the combined read/write offset would be reported as 0.

- M.

So if the read offset is +6 and the write offset is -6, then what settings should I use to get bit-by-bit identical copies of audio cds?
Or am I lucky and dont need to change anything if reading/writing with this drive?

I bet you mean: "AFAIK, the LITE-ON LTR-52327S has a read offset correction of +6 and a write offset of -6."
So, if the actual values for write offset and read offset are both -6, the combined read/write offset correction will be 0. My LG HL-DT-ST CDRW GCE8520B features the same thing.
Unfortunately, the EAC author Andre Wiethoff uses both correction and actual offset values as well in the program as in the faq, and it's always unsure which one he's talking about.
So
read offset - write offset = combined read/write offset or
read offset correction - write offset correction = combined read/write offset correction (is the same like multiplying the first formula with (-1) The formula given in the EAC faq is wrong, it mixes correction and actual values. A negative offset refers to a time shift to the beginning of the CD. The offsets on the "offset" tab in the EAC drive options are correction values, the write offset on the writer's "writer" tab is an actual value.
Back to the original issue; you use EAC offset CDs written with write offset 0, GoaTrancer, so the reported combined read/write offset correction will be 0.

You should use
-either write offset 0 for writing and combined read/write offset correction 0 for reextraction
-or write offset -6 for writing and read offset correction +6 for reextraction.
The second one is the more precise method; the tracks on the CD refer exactly to the wav files on harddisc.
In the following post I explain much about the issue:
http://www.hydrogenaudio.org/forums/index....ndpost&p=223826

The way offsets are signed in EAC is very simple. When you look at the wave file in the wav editor, any positive offset shifts the data to the right, and any negative offset shifts it to the left.
This is valid for all values : read offset correction, write offset, and combined offset.

I have the same problem with Tsstcorp SH W162C dvd drive
both test with eac test cd and nero cd dvd speed showed offset 0 samples
but the accurate rip database gives as read correction +6
so I dont know what offsets to apply
also I have to find the write offset
do you know this drive offsets

Did you burn the test CD with the LITE-ON, too?

I did burn the test cd with Tsstcorp SH W162C dvd drive

What write offset does that device have, -6 samples?

from the test cds that I burned with eac and nero 7 I didn't find write offset
maybe I don't know maybe there Is no such feature
but I did extract a track with read offset +6 then burn that track with write offset -6, extract the track from the writed cd and compared the first extracted track and the track from the burned cd there were no errors
so this mean that the offset are +6 read and -6 write