Originally Posted by JackRyan
I determined it because the DAC-1 reclocks and resamples the incoming data stream before converting it into an analog signal. Now if you want to speak to the fact no electronics is perfect and therefore the reclocking/resampling circuit in the DAC1 itself will have *some* jitter, I would agree. And if you further say that the incoming line jitter may have some observable effect on the final wave form in a laboratory setting due to careless circuit design, I would also concede that point. But to assert that the effect is audible at a practical listening situation indicates one of two things: the equipment was broken, or you really do have exceptionally sensitive hearing and a very very resolving sound system.
I dont have exceptional hearing, but it is good and my brain is properly trained.
I suggest you borrow a DAC-1 and try some different cables and the different interfaces yourself.
|One final note, Stereophile in this following article:
Stereophile: Bel Canto USB Link 24/96 USB-S/PDIF converter
Showed some graphs and made some comments about the DAC1's performance and susceptibility to input jitter. In the measurements section, it's mentioned:
Emphasis mine. But then again, the author may not have a system that was capable of resolving these easy to hear differences.
Precisely. I think if you heard some of these reviewers systems you would be shocked. Very few have what I would consider a resolving system.
If you read the review of my Overdrive DAC in February TAS and the following review of Amarra in March TAS, you will see that the reviewer says that initially he could not hear any improvement using Amarra with iTunes. Then he got my Overdrive DAC and heard a significant improvement with Amarra. This is due to the fact that the jitter and the distortion and noise were reduced. More resolving.
Most audiophiles feel that their systems are resolving. Reviewers do too. Most of them are not. There is usually a layer of noise, jitter and distortion that masks a lot of improvements that can be realized from better cables, lower jitter devices and better DAC's. When someone says that cables all sound the same or they cant hear the improvement with Amarra, or differences in jitter are not audible, it is usually indicative of this masking effect.
This is why it is so critically important to spend the money wisely, improving the source first and then the DAC and then go to the rest of the system. If the source has poor quality, usually nothing you do to the rest of the system matters much.