I've never had buzzing with my no-neutral caseta dimmers, ever.
Then you are either extremely lucky, are not using LED bulbs, or have a hearing issue 
I have tried a variety of dimmable LED bulbs, including those on Lutron’s recommended list, and they all buzz to some degree. Replacing the bulbs with incandescent bulbs makes them completely silent.
What brand dimmable LED bulbs are you using that are completely buzz free? I would love to find a brand of A19 bulbs that are quiet. The Philips dimmable dumb LED’s are tolerably quiet compared to others, but not as silent as an incandescent. Other brands were intolerable and were quickly returned.
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I'm using Edison LED's and have no hearing issues at all.
I'm using these:
No flicker, no buzz, smooth dimming and they look great.
I have 8 of them in a fixture in my kitchen and 4 more of them in the fixture above my dining room table.
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Thanks - I'll have to give those a try.
If you are willing to spend the money on the PD-5NE then I would recommend going to the full RadioRA 2 system. If you find a good dealer the most-used RRD-6ND dimmer can be in that same price range.
RadioRA 2 is better aesthetically IMO - the same Maestro style as Lutron's non-smart dimmers, so they can blend in with non-smart switches. They're easier to use - they are single push button toggles with a level bar on the side. They perform better - they have more programmable settings, especially the "on" level (full, not Select).
And I would recommend the full RadioRA 2 system, not Select. For the price of a couple dimmers and a few hours of online training you get access to add keypads to the system, more settings, and better programming software (Windows only).
