these are the sounds found in most native Afrikaans dialects:
there are also sounds not on the chart

Other sounds:
/w/, /v/, /z/ in loan words
postalveolar affricate in loan words
close-mid front vowels and open back unrounded vowel are always long
long counterparts of all vowels except schwa and open front vowel
nasalized vowels in certain positions

(from: Burgers, M.P.O. 1967. Teach Yourself Afrikaans. London: English Universities Press.
Mironov, S.A. 1969. Iazyk Afrikaans. Moskva: Nauka.)