© flutelia
On April 23, 2020, YouTube user 'Iron Rails And Pipe Dreams' recorded strange 'flute' sounds he heard around 8 a.m. that morning outside his home:
I began hearing these sounds at around 8:40am from inside my house this morning and they only kept intensifying as the morning dragged on. Finally unable to sleep, I grabbed my phone and began recording them. Interesting! The only place I've ever heard these sounds are here on YouTube from various videos people uploaded.