Voiced alveolar trill

The voiced alveolar trill is a type of consonant. It is found in some spoken languages. It is usually called the rolled R, rolling R, or trilled R. The International Phonetic Alphabet letter for this sound is ⟨⟩. The X-SAMPA symbol for this sound is r.
Dictionaries of languages like English and German sometimes use the symbol ⟨⟩. They have rhotic consonants that are not an alveolar trill. This is because typing the letter "r" is easier.
In many Indo-European languages, this sound is sometimes an allophone of the alveolar tap . This happens especially in unstressed syllables. Some languages like Catalan, Spanish, Albanian and some Portuguese treat these as two different sounds.
Raised alveolar non-sonorant trill.
In Czech, there are two different alveolar trills. There is the normal trill, written r. There is also another trill, written ř. This is found in words such as "rybáři" ('fishermen'), ('four'), and the common surname "Dvořák". The way it is pronounced is similar to but the tongue is raised. This other trill is partially fricative, with the frication sounding rather like , though not so retracted. Thus in the IPA it is written as ⟨r⟩ plus the raising diacritic, ⟨⟩. (Before the 1989 IPA Kiel Convention, it had a dedicated symbol ⟨⟩). It is normally voiced, but there is a voiceless allophone as with many other Czech consonants.
Listen: