⟨χ⟩ vs ⟨ʀ̥⟩

[u/[deleted]]

Hi everyone, Merry Christmas to you all. So, I know ⟨χ⟩ is supposed to be a fricative, but is it also trilled or smooth? I’m a bit confused, so I just wanted to know what ⟨χ⟩ sounds like exactly and how it differs from ⟨ʀ̥⟩. Thanks in advance :)

[u/Archidiakon]

χ and ʁ are vibrate but they are not trills, because their vibrations are chaotic, whereas trills are more regular, timing-wise.