• Registered: 2007-06-04
  • Posts: 694

Is there a limit to over-reading into the lead-in/lead-out?

Does every audio track have to end in silence?

I searched for a couple of hours trying to see if it has too and I found this.

Snake said this..

snake wrote:

I think you should try it before you believe that. Because personally, I think the chance of that happening is almost non existant. If you do NOT end an audio track on at least a small amount of silence, it's going to POP when played. I'd be surprised if you find even ONE CD where this is actually a problem.

http://www.eidolons-inn.net/tiki-view_f … entId=4510

Now, the game Razor Freestyle Scooter, track 07 doesn't have ending silence. Perfectrip gives the A-OK, same checksum twice and I listened to the song completely and I heard no pop. It also sounds exactly like if played from the original cd. It also matches sector length for that track with the original cd.

I asked a question about the Sega 32X CD game I dumped and that audio track seemingly doesn't end with silence either. Dumped with Perfectrip and was given the A-OK twice. same checksum and I listened to the clip completely and I heard no pop. It too sounds exactly like if played from the original cd, Also it matches sector length for that track with the original cd.

So if someone can please answer those question that would be great.

  • Registered: 2007-06-04
  • Posts: 694

No one has an opinion?

  • Jackal
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  • Registered: 2006-12-23
  • Posts: 4,132

I don't understand the question..

Does every audio track have to end in silence?

I don't think so..

and overreading only applies to the first and last audio sectors.. if the read offset is larger than the write offset I don't think you'll run into any problems where data is cut off etc.

4 Reply by pepsidrinker (edited by pepsidrinker 2008-03-06 18:17:12)

  • Registered: 2007-06-04
  • Posts: 694

Ok, to make sure I understand because -947 is not larger the +30 write offset I shouldn't have a problem with data cut off?

The Sega-CD 32X game only has one audio track, so if the drive didn't have overreading the beginning and end could potentially be cut off? My drive has overreading so it shouldn't be a problem.

I'm sorry if I am not making the question clear, I think the audio track for the Sega-CD 32X game is good as explained above that's why I was asking if it was really missing silence or some audio tracks don't have silence.

  • Jackal
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  • Registered: 2006-12-23
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Well, you could just check and compare the first and the last audio sectors (including the first couple lead-out sectors) to the IsoBuster sector browser output if you wanna be sure no data is cut off.

  • Registered: 2007-06-04
  • Posts: 694

Ok, thanks for the tip. smile

7 Reply by pepsidrinker (edited by pepsidrinker 2008-03-06 19:47:38)

  • Registered: 2007-06-04
  • Posts: 694

Wow, worked great, thanks...

The beginning of the track is missing this much according to the comparison between the two.

0000 : 92 12 C7 0E 36 13 AD 0F  60 14 92 10 08 16 B5 11   ....6...`.......
0010 : 74 17 CA 12 A5 17 FF 12  72 16 14 12 D8 13 39 10   t.......r.....9.
0020 : 14 0F BA 0C 26 09 F0 07  E4 03 66 03 57 00 F4 FF   ....&.....f.W...
0030 : C3 00 4D FF DF 04 08 02  36 09 B9 05 DA 0C 2E 09   ..M.....6.......
0040 : 9E 0E 70 0B CF 0C C7 0A  93 08 D2 07 B5 03 E0 03   ..p.............
0050 : 4A 00 68 00 1C FF C8 FE  86 FE 13 FE F1 FE 21 FE   J.h...........!.
0060 : 9A 00 90 FF 50 00 09 00  F6 FD 93 FE 93 FB CC FC   ....P...........
0070 : 17 FA 46 FB 56 FC 10 FC  44 01 A1 FF 3E 05 F2 02   ..F.V...D...>...
0080 : 72 09 49 06 34 0C 26 09  90 0A B2 08 62 06 D0 05   r.I.4.&.....b...
0090 : F2 FF 0A 01 5D F8 B6 FA  E7 F3 3B F6 34 F4 67 F5   ....].....;.4.g.
00A0 : 9A F8 17 F8 CE FE 25 FD  D0 02 45 01 41 03 B8 02   ......%...E.A...
00B0 : 2C 02 83 02 A1 01 F0 01  E5 02 6F 02 1B 05 0D 04   ,.........o.....
00C0 : 2B 06 F9 04 FD 06 9F 05  DA 06 EB 05 7B 03 D0 03   +...........{...
00D0 : 63 FF 8F 00 52 FC C1 FD  1F FB 25 FC F4 FC 0E FD   c...R.....%.....
00E0 : 26 00 7E FF 18 05 3F 03  8A 0A 11 08 56 0B FC 09   &.~...?.....V...
00F0 : D7 07 F7 07 AD 03 9B 04  BB 00 94 01 B5 00 AC 00   ................
0100 : 9B 02 C5 01 51 04 24 03  E5 06 30 05 BA 09 C2 07   ....Q.$...0.....
0110 : 7F 09 5E 08 87 07 1F 07  7F 06 24 06 25 06 AB 05   ..^.......$.%...
0120 : 6A 07 44 06 26 0A 24 08  C7 0C 3A 0A 35 0F 42 0C   j.D.&.$...:.5.B.
0130 : D7 0F 31 0D E5 0D 13 0C  2A 0C 8B 0A 21 0B 82 09   ..1.....*...!...
0140 : 27 09 F2 07 DB 06 E7 05  10 06 BD 04 79 08 10 06   '...........y...
0150 : D2 0B DF 08 3A 0C F4 09  55 0B 8A 09 C9 0A 0B 09   ....:...U.......
0160 : A1 0B 4C 09 43 0F B0 0B  75 11 CA 0D 10 11 CB 0D   ..L.C...u.......
0170 : 95 10 76 0D E1 0D CC 0B  7D 08 E8 07 17 02 D5 02   ..v.....}.......
0180 : 4D FC A8 FD A4 FA 3D FB  41 FD 81 FC 6A 00 1E FF   M.....=.A...j...
0190 : 63 02 50 01 CC 02 42 02  BD 00 42 01 43 FD A2 FE   c.P...B...B.C...
01A0 : C2 FA 28 FC E6 F8 67 FA  41 F6 51 F8 0D F4 58 F6   ..(...g.A.Q...X.
01B0 : 5F F4 2F F6 D9 F6 EE F7  B6 F8 C2 F9 55 F8 36 FA   _./.........U.6.
01C0 : FD F6 88 F9 08 F6 BD F8  3F F6 AE F8 39 F8 C7 F9   ........?...9...
01D0 : FA FB 5C FC D6 00 44 00  A4 03 2F 03 FF 02 6D 03   ..\...D.../...m.
01E0 : BE 00 F3 01 7A FC C5 FE  06 F7 50 FA 51 F2 16 F6   ....z.....P.Q...
01F0 : 6C EF F5 F2 E6 F1 B4 F3  30 F9 E1 F8 0A FF 4B FE   l.......0.....K.
0200 : 53 00 C8 00 0E FE DF FF  87 FB D2 FD 8D FB 51 FD   S.............Q.
0210 : F2 FC FE FD FC FD BF FE  97 FE 3A FF 35 FE 01 FF   ..........:.5...
0220 : 08 FC A7 FD 3F F8 CD FA  83 F4 A9 F7 92 F2 D0 F5   ....?...........
0230 : C2 F3 0B F6 C5 F8 67 F9  E3 FE 7B FE FD 01 D1 01   ......g...{.....
0240 : 3A 01 26 02 C6 FD F4 FF  08 FA BE FC DF F8 27 FB   :.&...........'.
0250 : 7B F9 31 FB BF FA C5 FB  91 FD C1 FD CC 00 7B 00   {.1...........{.
0260 : DE 02 84 02 62 03 63 03  98 02 1C 03 6D 00 A2 01   ....b.c.....m...
0270 : B7 FD 58 FF 84 FD 7A FE  35 00 07 00 D9 03 DA 02   ..X...z.5.......
0280 : B4 06 64 05 1C 08 D0 06  81 08 85 07 17 07 A8 06   ..d.............
0290 : 6E 05 14 05 EB 03 D8 03  02 01 77 01 26 01 B9 00   n.........w.&...
02A0 : 10 05 4E 03 DA 08 65 06  21 0C 55 09 DA 0C 96 0A   ..N...e.!.U.....
02B0 : CD 0B 00 0A BF 0C 81 0A  9D 0E D2 0B F0 0F DA 0C   ................
02C0 : 05 10 15 0D D8 0E 30 0C  E3 0D 57 0B 8C 0B AB 09   ......0...W.....
02D0 : 52 07 47 06 8C 04 7D 03  79 04 AD 02 7D 06 CC 03   R.G...}.y...}...
02E0 : 6B 09 3A 06 36 0A 79 07  00 08 63 06 B6 04 03 04   k.:.6.y...c.....
02F0 : B5 01 4C 01 71 00 C3 FF  ED FF 3C FF 7F FE 22 FE   ..L.q.....<...".
0300 : 42 FD 1D FD 54 FC 56 FC  52 FC FF FB DB FD 12 FD   B...T.V.R.......
0310 : C0 FE 0C FE 0B FF 6B FE  AE FF 0A FF 28 00 6B FF   ......k.....(.k.
0320 : 3B 02 AE 00 A8 06 D5 03  EC 0A 57 07 15 0D 97 09   ;.........W.....
0330 : A7 0B 3B 09 5E 06 96 05  54 00 A6 00 6F FA B5 FB   ..;.^...T...o...
0340 : 4D F4 76 F6 1C F1 00 F3  E3 F2 61 F3 06 F9 9E F7   M.v.......a.....
0350 : 44 00 B1 FD 22 04 E2 01  74 04 39 03 C7 02 86 02   D..."...t.9.....
0360 : FB 00 CE 00 C9 00 F3 FF  3B 00 52 FF 65 FE D4 FD   ........;.R.e...
0370 : AE FB C9 FB 45 F7 8F F8  D1 F2 D4 F4 13 F1 F5 F2   ....E...........
0380 : 03 F2 49 F3 0F F5 62 F5  EB F9 51 F9 AA FD DE FC   ..I...b...Q.....
0390 : CC FE 77 FE 82 FE BA FE  24 FD BB FD EF FB 97 FC   ..w.....$.......
03A0 : 73 FB 00 FC 27 FB 88 FB  68 FA 1B FB B9 F8 EC F9   s...'...h.......
03B0 : CD F7 EE F8 A6 F7 D7 F8  9D F7 BB F8 B4 F8 5C F9   ..............\.
03C0 : DB F8 C0 F9 94 F7 DB F8  7E F8 1B F9 C4 FC 0B FC   ........~.......
03D0 : 50 02 6D 00 07 06 F4 03  41 06 FD 04 A9 03 57 03   P.m.....A.....W.
03E0 : 06 01 FA 00 C0 FF 93 FF  ED FC 69 FD FA F7 96 F9

and the last audio data part ends at sector 266472 half way down and on the image it ends at sector 266473 all the way down and the last sector I get a device error message with the image so it's not good.

Now the question is, what caused it. A limit to overreading and if not then perfectrip must not be able to dump all the data either but more then EAC with huge negative offsets or the D8 method gave wrong results?

EDIT: Is there anyway to check original cd to image of the cd like you can do with two images in a hex editor?