I was going to mention that, but the periodicity is what gave me pause. Have you tried a filtered power source? Maybe powered by an UPS for a few minutes? That might help isolate the power feed as a factor.
Cheers! -- Diego Rivera On Sun, Apr 21, 2019, 14:20 Gary Buhrmaster <[email protected]> wrote: > On Sun, Apr 21, 2019 at 9:27 AM Jan Ceuleers <[email protected]> > wrote: > > > The audio defect is a clearly audible repetitive "whistling" noise, with > > a periodicity of about 1 second. This noise is not present on the audio > > signal that goes into the PVR. > > Just on principal, check the power supplies > (swap between the units that work and one > of the STB ones). And also check for ground > loops between the PC, the PVR and the > STB, which can result in all sorts of audio > artifacts (just go over the the audiophile > forums and discuss ground issues and > whines and whistles). > _______________________________________________ > pvrusb2 mailing list > [email protected] > http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2 > _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
