Is it normal that dimmable LED bulbs buzz when on a dimmer?

[lightingfan8902]

Since my dad wanted to put a dimmer on his chandelier in the foyer, I installed a Lutron LED, CFL, Halogen compatible 3-way dimmer, since they're multiple switches (one 4-way switch, and two 3-way switches) hooked up to the chandelier, which had sixteen LED filament bulbs in each socket, and each of them were four watts each making 64w. So when I replaced one of the 3-way switches, with a 3-way dimmer switch, with the power shut off of course, after I installed a 3-way dimmer switch, turned the breaker back on where I was working, and tried it and all of a sudden, the bulbs in the fixture started to buzz like a fluorescent ballast at around 50% brightness, when the dimmer is all the way down. But very slight buzz in the dimmer. Is this normal? Because I did wire it correctly for 3-way operation.