Choir performance is a form of social musical practice where both individuals and ensemble join actions to build a musical piece. In traditional choral theory, the performative role of the conductor is overestimated with respectto the choristers?. However, this biased view forgets that conductor and choristers are both performers, losing track of the interactive process that takes place in choral practice. In this study, we analyse the multimodal interaction that is generated inside the choir. Applying micro-analytical observation techniques, we look for multimodal cues (vocal tuning, conductor and choristers body movements) to describe meaning construction in the choir. We predict that the vocal homogeneity -usually conceived as the outcome generated by the conductor´s actions- is indeed the result of a multiple-way performative process that hides internal sound-kinetic variability.