The paper will describe a 600 statementFORTRAN IVsubprogram for the synthesis‐by‐rule of simple statements in Serbo‐Croatian, a Slavic tone language. The model receives an input phoneme string, calculates the duration of each segment in the string, computes a set of fundamental frequency values corresponding to the sentence intonation, and then modifies these fundamental frequency values to reflect the influence of word tone. Several factors affect the calculation of segmental duration, e.g., number of segments in the string, number of syllables in the word, accented versus unaccented syllable, type of accent, voicing characteristics of adjacent consonants, and others. Word tone is calculated as a deviation from the previously defined sentence intonation. The paper will be accompanied by slides and tape‐recorded samples.