Infiniteloop
Well-known member
Gazzip said:Infiniteloop said:There's clearly a lot more to digital than merely 1's and 0's.
What's surprising is that some people cannot hear the difference between great transports and most of the digital dross out there....
Digital is an esoteric format which, although often presented as 1's and 0's due to its abtruseness, is really no more or less than simply 1's and 0's.
I have read scientific studies which have tested and concluded that all transports will extract 100% bit-perfect information from CD's. This is due to their sophisticated and over engineered error detection and correction, which can correct (not interpolate but actually correct) up to 4000 consecutive, missing bits. This I respect and believe to be true. However how that extracted data is presented to the DAC and what is swimming around in the output signal along with that data is where I believe one transport can be "better" than another.
Jitter seems to be the most likely culprit for making the data presentation in some transports better than in others. Poorly isolated power supplies, servos working overtime to read badly stabilised discs (read transport system quality), damaged discs etc. can all introdcue clocking anomalies in the output signal of a transport. To compound issues this signal is then buffered, split, and in the case of an outboard DAC squeezed down a coaxial cable before it reaches the DAC. At this stage the DAC locks on to the transport's clocking signal and produces its own local clock to match the incoming signal. if the incoming clock is compromised then so will be the local clock. DACs have various tricks up their sleeves to deal with incoming clocking errors, but all are a compromise as I understand it and none of them are fool proof or proven to actually work.
Take from this what you will. I firmly believe that a well executed transport and associated circuitry, which deals with jitter at source before it reaches the DAC, will always sound more accurate (ergo better) than a transport which has been allowed to produce jitter on the premise that it is retrieving 100% of the signal so the job is done. It is not done if the transport is producing and presenting avoidable jitter to the DAC for local correction. Simple as that in my opinion.
Couldn't agree more.