“Speeds and Slownesses” invites a giant snail of the species Achatina fulica to collaborate in a computer-generated composition. Using frame difference as a method for motion detection, the snail’s movements are registered and translated into data. Frame difference compares two adjacent video frames and displays them as luminosity. The video was divided into nine segments, whose respective playback speed is determined by the intensity of the motion registered in each segment. Using granular synthesis—a sound synthesis technology that breaks down sound recordings into small particles or grains that are played back at very short intervals—the nine video segments and their respective tempi are then made audible as different rhythms, glissandi, microintervals and spatial sound movements—caused by a body in motion. Collaborating with another species encourages reconsidering one’s own time and temporality.