Effect of Internet Service Quality on Streaming?

@nagel You are right that the problem you had would be caused by a rogue radio, CB, or ham operator (in my day, when the FCC would actually be chasing these guys down they'd operate out of a mobile location (n.e. car/van) to stay ahead of them).

The problem you had is called "rf rectification".  Simply, what you heard was a subharmonic of the RF signal that a non-shielded electronics is picking up and "translating". Shielding speaker wires will get you nothing as it's actually a bi-product of incorrectly or insufficiently shielded electronics.

Although I haven't run into this is a long time the cure used to be putting aluminum foil around the receiver, installing a numetal shield, or replacing the piece of electronics.  

@nyev   May I recommend any of the harmonic AC conditioners / resonators from Coherence Systems. Their brand is ADD Powr. They work quite well especially for systems with bad power. The Sorcer Apprentice will revive the life in your system. It is a good value of price vs. performance.

Also, for usb ethernet, hdmi digital signal boost the Symphony I/O is a no brainer. It restores the harmonic integrity to your system. They give you 30 days to try anything so you have nothin to lose.

I stream over a T-Mobile unlimited data plan and it works just fine. There’s some startup latency but once the track commences there’s very rarely any interruption.

Sound quality versus file playback from a network HD is quite close. I use a dCS Rossini Player/DAC with clock. The unit seems impervious to tweaks upstream such as using fiber connectors, Ethernet filters, etc. It just works well without any fuss. I don’t have an answer as to why the sound of the OPs system is flat at certain times of the day, my understanding is that streaming services are sending packets of data that either arrive intact or don’t arrive at all, so they’re benign when it comes to issues of sound quality?

@mahler123

. . . I would just comment that if your system is so fine tuned that changes in digital cables can sound very significant, then I congratulate you on the excellence of your gear

Thank you! 🙏

IMHO, the excellence is in assembling a system where the gear has wonderful synergy . . . with special attention to the cabling, power conditioning & power management.

You gotta try either the ADDPowr Symphony I/O or the Vivid! You'll be pleasantly surprised!