This empirical tracking case study explores the content and quality of an infant's home musical environment and family member-infant musical interactions. To this end, this study tracked and analyzed audio recordings of an infant girl's family life between the ages of seven and thirteen months and follow-up interviews with her parents. The characteristics and patterns of how family-infant musical interactions developed and changed as the infant grew were then analyzed through the concept of community. It was found that the parents' recognition of the function of music and their perceptions of the infant's developmental patterns jointly determined the manner, frequency, content, and duration of parent-infant musical interactions. In turn, the infant's growing and changing musical ability prompted her family members to adjust their strategies and interaction methods with the infant. Descriptive statistics and qualitative data were synthesised to identify the parents' distinctive views of music education. On this basis, the infant's home musical environment, the content and quality of family member-infant musical interactions, the patterns of change in the frequency and duration of interactions, and the possible reasons for these qualities are discussed. Finally, the limitations of this study and future research directions are considered.