Aurender N10 - Sound quality performance is erratic

FYI to all - My methodology diagnosing this problem has been to play the same 10-15 reference tracks and take notes so I can compare day-to-day sound quality. My pre/amp are on all the time and the N10 is always in standby and fairly warm to the touch.

Also, to those who have mentioned drop outs, that has never been my problem. Sound quality is my one and only problem. Apparently both @hgeifman and @jon2020 have experienced similar SQ problems and have posted above; I thank you both.

Update

@jon2020  

Thank you for the clarification on the Play button tip. Last night I played a few tracks I am intimate with and then tried the long press of the "Play button" choosing the Restart option, and unfortunately for me, this did not change the sound quality at all.

Next, I tried a reset of my modem/router and that also had no effect at all. The system sounded the same for the entire session and through both of  these two changes. I checked, the ATT modem/router and it does not have a battery.

I have made a word doc and will start working through other suggestions as time allows. I think a good place to start is to have a tech come out and check all connections, both inside and outside. -I appreciate all the help so far.

FYI - I just want to say that Aurender has provided exceptional customer service so far. We all acknowledge this is an unusual problem and will continue to work towards solving it. I do appreciate your help here on Audiogon very much as well.

Last night I played a few tracks I am intimate with and then tried the long press of the "Play button" choosing the Restart option, and unfortunately for me, this did not change the sound quality at all.

@pokey77 

An additional step I take to clear the cache memory is to clear the last played playlist with the Clear button before I start playing a new playlist or album.

Yes. Aurender service is indeed top-notch. :)

@jon2020 

I never clear my playlist. I'll give that a try.