@mirror - I have identified a possible defect affecting my Z8.
If the Z8 receives a PCM signal at 705.6kHz (16 x oversampling a 44.1kHz signal in Roon) or re-sampled to 768kHz after a short while (just a few minutes) there is a clearly audible white noise in the background on one or both channels (more commonly the left). I get the same if resampled to DSD128 or 256.
If I pause the music, close Roon or disconnect the USB cable the noise continues so it is definitely the Z8...
Defect with Z8 at high frequencies (705.6/768kHz PCM, DSD128/256)
If the Z8 receives a PCM signal at 705.6kHz (16 x oversampling a 44.1kHz signal in Roon) or re-sampled to 768kHz after a short while (just a few minutes) there is a clearly audible white noise in the background on one or both channels (more commonly the left). I get the same if resampled to DSD128 or 256.
If I pause the music, close Roon or disconnect the USB cable the noise continues so it is definitely the Z8...
Defect with Z8 at high frequencies (705.6/768kHz PCM, DSD128/256)