Hello all, first time member and poster here...I am usually in AVSForums and a member there suggested I come here and ask...so here it goes! I have a HR23-700 receiver and it is hooked up via HDMI (only hookup I prefer) to my Pioneer VSX92TXH A/V Receiver and then going to a Sony KDL-55EX500. Ever since the last auto update that D* does (I am pretty sure just after) I started to notice a sound that happens infrequently but is starting to drive me boinkers. The sound lasts for a brief second and sounds like the sound a dirty knob will make on a audio component when you turn it...like a dusty knob..if I may say. It isn't as loud to worry about speakers but just annoying. I haven't noticed it on the other components but I only watch mostly bluray and an occasional music score since this is basically for HT. I am a little worried it is the Pioneer but I will try to find the time to listen to a few more movies and see if it happens on other components as well. I am hoping it isn't the case and it's D*...hate to have to unhook everything and send the Pioneer in to be serviced, and with the problem being very infrequent it would take some time I am sure before techs found the problem... Thanks for the look see!