Hi, Those days, I try to code a little thing to parse a .CCD file. I am sure that people here are very comfortable with some definitions I am about to tell : it is only to clarify the subject of my question. I start from the fact that time in CCD file is indicated by 3 fields : - Minute - Second - Frame These time information is present twice on a section called "Entry". An example below : [Entry 8] Session=1 Point=0xc1 ADR=0x05 Control=0x00 TrackNo=0 AMin=4 ASec=152 AFrame=96 ALBA=29346 Zero=0 PMin=0 PSec=0 PFrame=0 PLBA=-150 AMin, ASec, AFrame to indicate Absolute time (I think). PMin, PSec, PFrame to indicate Point time (I think). In a theoretical point of view, there are means to translate a time to an address. The address is called LBA (Logical Block Address) and there are ALBA to indicate Absolute address and PLBA to indicate Point address. As I want is to deal with the less fields and datas in my code, I take only Minute, Second, Frame values and later use means to compute address value. I know two means to compute it : - a translation table between LBA and MSF found in a file called "SCSI-3 – Multimedia Commands" from "American National Standards Institute" page 115. - a formula from ECMA-394 Chapter 13: Attachment 11 : LBN = (((MIN*60)+SEC)*75+FRAMES)-150 But quickly I face very confusing LBA values that do not match any known means result. Let's concentrate about Absolute time and Absolute address. I have selected three (from many) examples where I could not understand how CloneCd figure it out. Problem 1 [Entry 8] Session=1 Point=0xc1 ADR=0x05 Control=0x00 TrackNo=0 AMin=4 ASec=152 AFrame=96 ALBA=29346 Zero=0 PMin=0 PSec=0 PFrame=0 PLBA=-150 AMin=4 ASec=152 AFrame=96 ALBA=29346 Using LBA to MSF transaltion table : 29346<=> 60:00:48 Using ECMA formula : (((4 * 60) + 152) * 75 + 96) - 150 = 29346 Problem 2 [Entry 10] Session=2 Point=0xb0 ADR=0x05 Control=0x04 TrackNo=0 AMin=255 ASec=255 AFrame=255 ALBA=716730 Zero=1 PMin=79 PSec=59 PFrame=73 PLBA=359848 AMin=255 ASec=255 AFrame=255 ALBA=716730 Using LBA to MSF transaltion table : impossible because 255 is out of range Using ECMA formula : (((255 * 60) + 255) * 75 + 255) - 150 = 1166730 Problem 3 [Entry 5] Session=1 Point=0xc0 ADR=0x05 Control=0x04 TrackNo=0 AMin=160 ASec=0 AFrame=48 ALBA=269898 Zero=0 PMin=97 PSec=26 PFrame=66 PLBA=-11634 AMin=160 ASec=0 AFrame=48 ALBA=269898 Using LBA to MSF transaltion table : 269898 <=> 60:00:48 Using ECMA formula : (((160 * 60) + 0) * 75 + 48) - 150 = 719898 How CloneCd compute ALBA in those case (PLBA should have same issue) ? Thanks in advance for any help.