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1. “Mac Quad G5” CDDA->AIFF (Just drag the file from the CD disc on desktop)
2. “Mac Quad G5” internal DVD-Rom – iTunes 8 imports -> AIFF (1st time)
3. “Mac Quad G5” internal DVD-Rom – iTunes 8 imports -> AIFF (2nd time)
4. “PC QuadCore” internal Pioneer DVD – iTunes 8 imports -> AIFF (1st time)
5. “PC QuadCore” internal Pioneer DVD – iTunes 8 imports -> AIFF (2nd time)
6. “PC QuadCore” Plextor Premium Professional -> Extract Audio from CD -> Wav
7. “Mac G4 Powerbook 1Ghz” External USB1.0 ASUS CD-Rom CDDA -> AIFF (drag file)
8. “PC QuadCore” EAC -> Secure Rip -> Wav
9. “PC QuadCore” Wavelab CD import -> Ultra Safe CD import -> Wav
10. This file is created by our PC iTunes real time playback CD via Weiss AFI1 firewire interface -> AES digital output to our Crookwood mastering console -> loop back to Lynx AES16 digital audio soundcard -> capture input by WaveLab software.

They are identical. No matter it is ripped by EAC, Plextools, Wavelab, or by PC iTunes, QuadCore Mac iTunes, Powerbook iTunes, USB 1.0 external Asus DVD drives, they are all bit transparent.

In the file comparison tests, we prove iTunes 8 and up to date computer/CD/DVD drives, are capable to rip bit perfect data same as EAC, Wavelab and Plextools.

ITunes PC & MAC Version 8.1.1.10 provides different results.

Mac iTunes 8.1.1.10 produces bit transparent results on all our tests: 16/44.1 & 24/96 & 24/192

PC iTunes 8.1.1.10 produces bit transparent result on CD format (16bit/44.1kHz). The digital data higher than 16bit (20bit-24bit) or sampling rate (96kHz & 192kHz) are changed by PC iTunes playback engine. ***(UPDATE: you can get bit transparent playback on iTUNES PC by setting up the correct QuickTime Preference setting. More info please read CAS8 : http://www.designwsound.com/dwsblog/?page_id=1720)***

The following test is using Wavelab as playback and record engine on 24bit/192kHz with bit transparent result.

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