Recorded some balloon pops in Spro Cave, Nesodden with a Sony ECM. MS 5 stereo microphone, thanks to Elise Mac and NOTAM Oslo. Spro Cave, can now be listened to on https://acousticatlas.de. Photo credits: Ray Hegelbach. Acoustic Atlas aims to digitally preserve the acoustics and soundscapes of natural and cultural world heritage sites. #AcousticAtlas #Arch #SoundArchitecture #NetworkedSound #Nesodden