@Samson4000 it's more likely Minecraft took it from here or used the same source material from opengameart (see description). Minecraft uses (or at least did in previous releases) some of my whoosh sounds as well.
@PD it's superior quality. Although obviously it's not superior usability. One day Freesound might have a "download as mp3" function but I for one will keep using FLAC because it's lossless while being compressed as opposed to WAV. You can use sox, Audacity or other tools to convert, some might be quick to use.