Poor audio device usually allows for more range to the incoming stream thus allowing the 568 to lock. However if the 568 is out of spec then all external streams will look out of range. It may be on the edge of spec and when there is a deviation it gets lost. Just a guess but this is something that happens on the 568. It gets lost. I use a 518 with all my SPDIF connections to eliminate this from happening. You could also have some other device that is emitting excessive RF that could be screwing up sync. Switching power supplies can screw up SPDIF and cause excessive jitter.

Last edited by Ronomy; 2012-01-12 13:34.
HT: 568.2mm (Revelation One filter), 518x2, SB3, Bryston 7BSTx3, 8BST, Aerial 10T, CC3, SW12(Qty2) w/SVS AS-EQ1, MK Tripole x4. JVC RS1u, DVDO Duo, Oppo 103 w/Vanity103HD, Sony PS3, VIP 3D Theatre, Acer H5360. Logitech Ultimate Remote and Hub.