In Italian we have the alveolar trill as a phoneme, but not all native speakers (me, for example) can do it: some people have what we call an "Erre Moscia" meaning we can't properly do the trill and instead do a completely different sound.
I tried looking online and some people said that it is a Uvular trill (
/ʀ/) a Voiced uvular fricative (
/ʁ/) or a Voiced labiodental approximant (
/ʋ/), but I tried making all those sounds and they're completely different, it's not the ones I nor anyone I know do instead of the normal
/r/. I tried looking through the IPA chart and sound formation but I couldn't find anything that resembles the sound I make.
So my question is: does anyone know what this sound actually is? Does it have a name/symbol? How is it articulated/made exactly?
If it can help, I personally do it with my tongue in rest position, as it usually stays flat in the bottom of the mouth. I also remember reading somewhere that it could be made by vibrating the back part of the tongue rather than the tip, but I don't remember where I read it so I can't confirm.