A descriptive study is utilized to examine fast speech phenomena in Asante Twi, a Niger-Congo language, focusing on three fast speech rules: vowel deletion, vowel alternation in modifiers, and fricative voicing between sonorants. Transcribed and interlinerized texts from a field methods class at Rice University are used for this study. The morphological and phonetic levels of the language are compared to formulate the rules for this paper. All phonetic level transcriptions were aurally checked at least twice for accuracy. Results indicate that fast speech rules are conditioned both phonotactically and syntactically in Asante Twi.