 I now made some experiments, exciting the tamtam with a great variety of implements – of glass, cardboard, metal, wood, rubber, plastic – that I collected from around the house, and connected a microphone (with strong directional sensitivity) that I held in my hand and moved around, to an electrical filter, whose output led to a potentiometer and was then made audible over a loudspeaker.My collaborator Spek was in the house and changed the filter settings and the dynamic levels, improvising.At the same time, we recorded the result on tape.