reclocking

Alfe - you can see some Async USB and reclocker jitter plots here:

http://www.audiocircle.com/index.php?topic=115008.0

Any manufacturer that claims their device (not the clock) delivers 10psec of jitter on S/PDIF are not living on this planet.

Steve N.
Empirical Audio

Steve...thank you very much for the explanation!

Steve
Thank you for your explanation.
I'm disc manufacturer and believe me all the masters that we are getting from studios are disaster when it come to jitter and as we say here in france" the nicest girl of the world can't give more than what she has"

Alfe - that is a shame. I dont believe that most mastering studios realize how important jitter is in the A/D. It is expensive to get low jitter in a A/D and the other devices used, like preamps are critical as well. Most studios dont spend enough for this equipment. This seems to be the trend; lower cost garage studios using computers etc..

Once the jitter is in the master, there is nothing you can do to improve this.

I'm a strong believer in capturing the master on analog tape and mixing it analog. Then digitize it.

At lest the playback jitter we can have an effect on. There seems to be no linits to getting it low enough. Evey time I achieve lower measured jitter, I can hear the improvement. Even the difference in sound quality between 50psec and 25psec. Who would have thought?

Steve N.
Empirical Audio

Steve,

I'm not comlaining about "cheap" USB converters, I complain about ALL USB converters. USB uses packets of data-music is best served via data streams. Pretty simple. No way to get around it.