HOW MINECRAFT SOUNDS ARE MADE
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Where do Minecraft’s sounds come from? Everywhere! Between a toilet paper roll, actual dolphins, and a grown man burping into a microphone, our Studio Audio ...

Alternative link: https://invidious.darkness.services/watch?v=4XmJPb4Qt5Y

Mojang demonstrate how some of the games sound effects were made; from modern sounds, also going back to some of the older sounds. I find it cool that they recorded real dolphin sounds themselves. The way the phantom was recorded was outright creepy.