People complain about audio being slow to listen to - I don't know, people do listen to hours of podcasts. People do spend hours on tiktok. With enough users and a voting system, the best content should rise to the top. With the playlist functionality, you'd queue the posts you want to listen to and listen to them passively, while cleaning the room or driving to work.
Recording little songs or super short flashfiction stories... With the right creators to make quality content, I totally see how this could turn into something awesome.
One bit of feedback - why require the usernames to end on a number? I want to use a username Im using everywhere else.
Also, uploading an audio file didn't work for me.