https://www.tumblr.com/audio_file/coolcucumbersome/169775410389/tumblr_oz6189J0nq1ww6ip0?plead=please-dont-download-this-or-our-lawyers-wont-let-us-host-audio
https://coolcucumbersome.tumblr.com/post/169775410389/audio_player_iframe/coolcucumbersome/tumblr_oz6189J0nq1ww6ip0?audio_file=https%3A%2F%2Fwww.tumblr.com%2Faudio_file%2Fcoolcucumbersome%2F169775410389%2Ftumblr_oz6189J0nq1ww6ip0

dynjir:

angry-diarrhea:

kaiserbeamz:

The straw description isn’t actually too far from the truth!
The instrument used to create that sounds is called a cuica (Brazillian) and from my understanding of it, it’s pretty much the same concept as moving a straw up and down!