The voiced velar fricative is a type of consonantal sound, used in various spoken languages. It is not found in English today, but did exist in Old English. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ɣ⟩ (a variant of the Greek letter gamma, ⟨γ⟩, which is used for this sound in Modern Greek), also graphically similar to ⟨ɤ⟩, the IPA symbol for a close-mid back unrounded vowel), and the equivalent X-SAMPA symbol is G. The symbol ɣ is also sometimes used to represent the velar approximant, though that is more accurately written with the lowering diacritic: or . The IPA also provides a dedicated symbol for a velar approximant, though there can be stylistic reasons to not use it in phonetic transcription.
Read more about Voiced Velar Fricative: Features, Occurrence