What might be the reason of audible HDD noise in line out?
I swapped power supplies and HDD's. Installed Creative Extreme Audio PCIe card but no difference. Changed motherboard and CPU.
The noise level is somewhere near -50dB and sounds very much like the HDD seek itself. Obviously must be a power lines problem, but still rather weird.
Intel DQ35JO motherboard, Samsung HD160HJ or Seagate Barracuda ST3500320AS (B)
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