laboratory, 25ºC, mainly ultrasound, cannot be played directly (tape recorder Racal with B&K 1/4" with protecting grid, 1 kHz high pass filter, in red light)

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith