Pulso IItook shape through a series of field recordings using contact microphones on the Mexico City subway commute between lines 2 and 8 at approximately 6 p.m., when the flux of people is at its peak. I placed the contact microphones on a steel sheet situated on the subway car’s floor, which beats with each footstep made by the commuters. Broadly speaking, these sounds are, at first, treated as perpetual sounds, then as percussion sounds produced by the unpredictable walking of the commuters.

Source: 2022