The pronunciation guide that appeared in the Overview is intended for speakers of North American English. This more complete pronunciation guide uses the International Phonetic Alphabet, and comparison with the other five source languages of Lojban, in order to be useful outside North America.
Rather than concentrate on precise phonetic targets, Lojban phonemes have a range of allowed pronunciations, although there are preferred variants (given first in the IPA chart below.) The intent is to allow speakers to be understood unambiguously, rather than to devise a specific Lojban 'accent'. (ASCII IPA transliteration uses Evan Kirshenbaum's scheme.)