進行這個記錄的原因，是因為坊間流傳太多貴價的 CD Drive 會令 Rip 出來的檔案更動聽更接近原 CD 的質數。在某討論區更出現有不同「級數」的電腦 Rip 「同一批」的 CD 出現不同音質的神奇情況。如果你是說 Real Time 實時播放 CD 的話，這個在下也不會反駁，因為這樣只能用耳朵鑑別，心理因素也會影響很大。而 CD Ripping 方面，我們則可以透過 CRC / MD5 Checksum 等方法完美核對檔案，基本只要有 1bit 的 data 不相同也能計算得到。
在此先簡單列出用來 Rip CD 的電腦規格：
Desktop PC
OS: Microsoft Windows XP Professional Service Pack 2
CPU: Intel Core 2 Duo E6750
Chipset: Intel P35
GPU: NVIDIA GeForce 8600 GT
Sound Card: Creative E-MU 1212M PCI
CD Drive: HL-DT-STDVDRAM GH20NS10
Notebook
OS: Microsoft Windows 7 Professional
CPU: Intel Core 2 Duo T6670
Chipset: Intel PM45
GPU: ATI Mobility Radeon HD 4500 Series
Sound Card: Onboard (Realtek High Definition Audio)
CD Drive: HL-DT-STDVDRAM GSA-T50N
CD Ripping Control Records 光碟擷取對照記錄
CD#0001
栗林みな実 / mind touch (初回版)
Desktop PC Log
Exact Audio Copy V0.99 prebeta 5 from 4. May 2009Notebook Log
EAC extraction logfile from 25. April 2010, 5:52
栗林みな実 / mind touch
Used drive : HL-DT-STDVDRAM GH20NS10 Adapter: 2 ID: 0
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : No
Make use of C2 pointers : No
Read offset correction : 667
Overread into Lead-In and Lead-Out : No
Fill up missing offset samples with silence : Yes
Delete leading and trailing silent blocks : No
Null samples used in CRC calculations : No
Used interface : Installed external ASPI interface
Used output format : Internal WAV Routines
Sample format : 44.100 Hz; 16 Bit; Stereo
TOC of the extracted CD
Track | Start | Length | Start sector | End sector
---------------------------------------------------------
1 | 0:00.00 | 4:48.47 | 0 | 21646
2 | 4:48.47 | 5:08.02 | 21647 | 44748
3 | 9:56.49 | 4:37.52 | 44749 | 65575
4 | 14:34.26 | 4:16.29 | 65576 | 84804
5 | 18:50.55 | 4:32.26 | 84805 | 105230
6 | 23:23.06 | 4:10.33 | 105231 | 124013
7 | 27:33.39 | 4:48.27 | 124014 | 145640
8 | 32:21.66 | 4:47.05 | 145641 | 167170
9 | 37:08.71 | 4:10.53 | 167171 | 185973
10 | 41:19.49 | 5:39.70 | 185974 | 211468
11 | 46:59.44 | 4:15.22 | 211469 | 230615
12 | 51:14.66 | 4:36.65 | 230616 | 251380
13 | 55:51.56 | 4:21.20 | 251381 | 270975
Range status and errors
Selected range
Filename Z:\mind touch\CDImage.wav
Peak level 98.8 %
Range quality 100.0 %
Copy CRC A01845B6
Copy OK
No errors occurred
AccurateRip summary
Track 1 not present in database
Track 2 not present in database
Track 3 not present in database
Track 4 not present in database
Track 5 not present in database
Track 6 not present in database
Track 7 not present in database
Track 8 not present in database
Track 9 not present in database
Track 10 not present in database
Track 11 not present in database
Track 12 not present in database
Track 13 not present in database
None of the tracks are present in the AccurateRip database
End of status report
Exact Audio Copy V0.99 prebeta 5 from 4. May 2009Result: Accurately Ripped A01845B
EAC extraction logfile from 25. April 2010, 6:20
栗林みな実 / mind touch
Used drive : HL-DT-STDVDRAM GSA-T50N Adapter: 0 ID: 1
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : No
Make use of C2 pointers : No
Read offset correction : 667
Overread into Lead-In and Lead-Out : No
Fill up missing offset samples with silence : Yes
Delete leading and trailing silent blocks : No
Null samples used in CRC calculations : No
Used interface : Installed external ASPI interface
Used output format : Internal WAV Routines
Sample format : 44.100 Hz; 16 Bit; Stereo
TOC of the extracted CD
Track | Start | Length | Start sector | End sector
---------------------------------------------------------
1 | 0:00.00 | 4:48.47 | 0 | 21646
2 | 4:48.47 | 5:08.02 | 21647 | 44748
3 | 9:56.49 | 4:37.52 | 44749 | 65575
4 | 14:34.26 | 4:16.29 | 65576 | 84804
5 | 18:50.55 | 4:32.26 | 84805 | 105230
6 | 23:23.06 | 4:10.33 | 105231 | 124013
7 | 27:33.39 | 4:48.27 | 124014 | 145640
8 | 32:21.66 | 4:47.05 | 145641 | 167170
9 | 37:08.71 | 4:10.53 | 167171 | 185973
10 | 41:19.49 | 5:39.70 | 185974 | 211468
11 | 46:59.44 | 4:15.22 | 211469 | 230615
12 | 51:14.66 | 4:36.65 | 230616 | 251380
13 | 55:51.56 | 4:21.20 | 251381 | 270975
Range status and errors
Selected range
Filename Z:\mind touch\CDImage.wav
Peak level 98.8 %
Range quality 100.0 %
Copy CRC A01845B6
Copy OK
No errors occurred
AccurateRip summary
Track 1 not present in database
Track 2 not present in database
Track 3 not present in database
Track 4 not present in database
Track 5 not present in database
Track 6 not present in database
Track 7 not present in database
Track 8 not present in database
Track 9 not present in database
Track 10 not present in database
Track 11 not present in database
Track 12 not present in database
Track 13 not present in database
None of the tracks are present in the AccurateRip database
End of status report
*英文名中的Control取自科學名詞「Control Experiment」（對照實驗），如文法不通請勿見怪 XD
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