field recording (Iguazú), 25.5ºC, ~20:00 h (ultrasound, Pettersson D1000X, sample rate 100 kHz, recording M00050)

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