I designed this sound from scratch using a 20 millisecond pop of audio looped and processed heavily using ableton live's sampler instrument. The loop is 2 bars long, but it this sample file i trail off for quite a few seconds sustaining the note to show off the sustain processing on the synth.
Short sample of bees. Recorded near alicante, spain with a microport in january 2018, recorded by a sound device mixer. No additional processing has been added.