Jitter issues with dacs....

Jitter is a problem with virtually all Transports, particularly stock. Jitter is also increased with lossy S/PDIF cabling. It is aggravated by systems that are not properly impedance matched as well.

I can only speak for myself - I can plainly hear the effects of jitter - they are like echoes or halos around each instrument or like high-frequency sibilance. Adding a Superclock2 to a transport or DAC significantly reduces jitter and this change should be obvious to anyone that is not deaf.

Kana813 - no I have not measured the jitter. I would like to, but I need some equipment that I cannot currently afford in order to do this....

Eldartford is correct. Solving the jitter problem only requires FIFO buffering at the desination. However, it is non-trivial to still maintain all of the real-time functions of a typical DVD or CD player with a FIFO buffer queuing the data, such as fast forward, skip etc, without incurring large latency penalties.

Andy2 - I am referring to a large FIFO buffer at the DAC, not in the transport. If this is in place, then the data can be clocked out of this buffer independent of the speed of the drive, virtually eliminating jitter, assuming the read clock is very stable.

I know a little bit about this, having designed digital harware as a EE for almost 30 years. I was a design team leader on the Pentium 2.