Quoting jcowan@REUTERSHEALTH.COM:
> Andreas Johansson scripsit:
>
> > You see - the current scheme is too confusing for my poor brain! (And I'm
> sure
> > someone told me [r`] was the approximant recently; grumble, grumble.)
>
> In X-SAMPA ` functions as the retroflex diacritic as well as the rhotacized
> one, depending on whether it follows a consonant or a vowel.
Except that adding it to the alveolar trill [r] doesn't produce a sign for a
retroflex trill, which is precisely what I'm complaining of.
Andreas