I found that if my DVD player I use as a transport (Marantz DV18) is on, it sometimes produces a similar high pitched whine when I'm listening to my SACD player, which uses Nordost Quattro Fil interconnects, particularly if I have a disc in the DVD player. No problem with my other digital sources, which are using very heavily shielded interconnects. Sound goes away when I turn off the DVD player. I think that, combined with the Nordost's lower shielding protection, is the culprit in my system, and it may be in yours as well. DVD players tend to send out a lot of RFI or similar interference by themselves when they are on, more so than CD players, in my experience. Curious to see if that's the explanation in your system.
Help Not 60Hz hum but 10Khz wine noise
I have a high frequency wining noise that increases with the volume. I have 4 dedicated 20 amp plugs, my SACD player only is grounded (Aloia amp/preamp and DVD player ground is lifted), no interconnects are touching. Never had the noise with just the SACD connected but as soon as I added the Tech DVD A10N the noise appears. The noise comes and goes also. But, if I disconnect the SACD ic at the SACD rca jack, the noise disappears (leaving the A10N connected). If I plug the A10 into the same preamp position as the SACD (SACD not connected), no noise either. I can't understand why the noise would come and go. Next step is to connect the A10n to another circuit (original home service) and then separate the dedicated ground (separate ground loop installed outside for 20 amp dedicate lines) the electrician combined with the existing ground to stay in code. Thanks