Bats in a Locked-down back garden by ryouell published on 2020-04-25T21:20:31Z It was great to hear the bats had returned to our garden this spring. I think they are Common Pipistrelles - but I'm happy to be corrected. A pair of MKH8020 mics 30cm spaced AB. The left one inside a Rycote 'Super Softie' windjammer, the right one 'naked'. To SoundDevices 702 recorder set at 192kHz, 24 bit recording. The uploaded track is a mix of the track as recorded mixed with a 'hetrodyne' copy of that track. The hetrodyne track was high pass filtered at 20kHz to remove all the human audible sound and then passed through the Reaper ReaPitch plugin and pitch-shifted down 3 and a half octaves. What you hear a mix of the human audible sounds mixed with the 'bat sounds' pitched down by 3 and a half octaves. Simples! I notice that the Rycote 'Super Softie' greatly attenuates the bats ultrasonic sounds as the pitched-down mix is much quieter in the left channel than in the right channel - which was recorded with an identical microphone but without any windjammer. It's all recorded in my back garden - with plenty of passing traffic, birdsong etc. Genre Field Sound Recording