I just replied to a similar question
here.
CD Transport making a difference is indeed same as cables, and I never thought about making that comparison. And similar to cables, people saying they make a difference only use their ears, and when they measure, they don't do it on what matters.
Ok, so now, there are tangible differences and some will be audible:
- Tracking capabilities and resistance to scratched CDs will make an audible difference in worst case scenario, with audible clicks and/or difficulties to play.
- BluRay and DVD Players with HDMI outputs are likely to modify the SPDIF digital output in the context of respecting anti-piracy regulations.
- Some players process the digital stream to satisfy specific needs, such as volume control, or sampling rate change (via an ASRC).
- Speed of the drive to skip one or multiple tracks, and when FFW/REW.
- Speed to read the TOC.
- Ability to run at different angles.
- Operating noise.
- Gapless playback.
- Precision of the clock at the output (measured in ppm) which transitions to the DAC, as per the SPDIF protocol.
People have been talking for years about drives and so transports sounding different (I mean all of them sounding different), and no, that's not the case. A large majority output the digital data exactly as it is on the Audio CD.
I think I have data about the NJoe, by the way, but it's one of those I thought it's necessary to shoot the ambulance
And yeah a VRDS CMK-3.2 in a Wadia or Teac/Esoteric has the same digital output as all other Sony KSS laser based drives from many other players, or a CDM from Philips also found in so many players. Moder CD Players also have the same digital output, to few exceptions. The
SMSL PL100 digital output if the most recent example.