Show HN: I slowed down and visualized birdsong [video]

Hi HN. Here's an idea I've been sitting on for a long time!

Many moons ago I started listening to the sounds outside through my microphone. The most fascinating ones were the birdsong. I also learned that if you slow them down, they sound like dinosaurs, or whales.

Also spectrograms are very cool.

I decided to finally make a video of the result and share it with the world :)

The source audio here isn't mine (I don't have a good mic at the moment), it comes from an Australian birdwatching group: https://www.youtube.com/watch?v=alEXh6g5WSU

I slowed it down in Audacity, then made the visualization with FL Studio.

I recorded the visualization with ffmpeg. (Turns out my computer can handle that, I just needed `preset -ultrafast`... the more you know!)

Let me know what you think! Is anyone else playing with spectrograms?