Originally Posted by rare-air
Getting high pitched Pops !
My 705 has taken to giving high pitched pops out of random speakers when some sort of Audio processing is taking place. That is if I have it on pure direct it does not give these pops even if immediately before it was. I will go days without this happening and then it starts happening and may or may not go away.
Has anyone else experienced this issue? If so have you had anyone look at it? Even though I purchased a Denon X4000 to replace the 705 I may try to get this fixed and use it upstairs if it is not too expensive.
The other thing to note is that it does not happen to sources other than my Comcast X1 box. Now it is possible that it is the X1 box, God only knows how crappy that box is but if I rewind and play it does not happen. Still it could be some sort of surge through the X1.
A few different things to consider: Sounds like it may be isolated to your cable box?... so there you go... maybe ask for a replacement from your cable company if all else checks out fine. First, how is your box connected to your 705? HDMI? or more specifically, how is the audio for it run to your 705? Through HDMI as well? I would try swapping/reseating HDMI cable first, or try using another HDMI input on your receiver. Then try an optical digital connection or analog audio connection from the box to your 705 and see if the pops are still there...
A long shot, but there was a service bulletin issued for that model for updated DSP firmware due to "loud pops" and such that can randomly occur.... BUT, technically that problem was only noted with bitstreaming DTS soundtracks, and you most certainly don't have DTS coming from your cable box. At any rate, you can get the firmware from Onkyo and burn it onto a CD-R and update that particular receiver firmware yourself using a regular DVD player... Again contact Onkyo for specifics or also you may be able to find info on the procedure by searching this thread...